Output two numbers (Cops' thread)

Question

This is the cops' thread to a cops-and-robbers challenge. Click the link to find the robbers' thread.

The challenge here is very simple. Create two programs of the same size, in the same language, which output (using 1 standard output method) two different natural numbers, \$x\$ and \$y\$. Submit both programs, both numbers and the language used in an answer on this thread.

Robbers will then attempt to find a program in the same language which outputs a number in between \$x\$ and \$y\$, and is the same length as or shorter than your programs. If they do, they will post it to the robbers' thread, and it is "cracked".

For example If I post:

Haskell, \$9-7 = 2\$, 12 bytes
main=print 7
main=print 9

Then robbers must find a program that prints 8 in 12 bytes or fewer.

Unlike many challenges in cop's do not need to have an answer in mind when posting. It is perfectly valid to post an answer which cannot be cracked at all. In fact that is incentivized. However the scoring means that the better you score the harder it will be to prevent a crack.

Scoring

Your score will be the difference between \$x\$ and \$y\$. So in the example answer it was \$2\$. Higher score is better. If your answer is cracked it's score is automatically set to 0.

Since there is no hidden information that needs to be revealed, answers will not be marked as safe. You get your score as soon as you post the answer and it will remain your score until someone cracks it.

If our language allows us to output an infinite number (R can output Inf, for instance), is a program that outputs this acceptable (for an infinite score if uncracked)? — Dominic van Essen, Commented Jan 31, 2022 at 12:07
@DominicvanEssen I would argue that 2e308 theoretically refers to Inf not an integer. So it's clear to me that this is a subjective measurement. Your answer should be correct given enough memory. — Wheat Wizard, Commented Jan 31, 2022 at 12:20
You say "program" in the challenge description - must answers be full programs, or are functions acceptable? Also, must both programs use the same output method, and must robbers' posts also? (I would suggest saying they must) — pxeger, Commented Jan 31, 2022 at 16:55
@DewiMorgan That's fine but you score very low, so I don't think it's even worth it. — Wheat Wizard, Commented Jan 31, 2022 at 19:15
Does the robber's number need to be natural? For cops it's specified explicitly, but not for robbers. — pajonk, Commented Jan 31, 2022 at 19:16

pxeger · Accepted Answer · 2022-02-01 07:47:07Z

27

Zsh, 1 byte, score 124, provably uncrackable

Programs output via exit code.

Outputs 126 ("permission denied"). Attempt This Online!

Outputs 2 ("invalid argument"). Attempt This Online!

Here is a script which tests all 256 possible 1-byte programs, which you can use to verify that this is uncrackable (and unbeatable for 1-byters):

{ for c ({0..255}) ( zsh -c ${(#)c} &>/dev/null; echo $? ) } | sort -n

Attempt This Online!

The empty program exits with 0.

edited Feb 1, 2022 at 7:47

answered Jan 31, 2022 at 17:03

pxeger

24.6k4 gold badges53 silver badges141 bronze badges

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Kamila Szewczyk · Accepted Answer · 2022-02-02 07:48:03Z

13

Malbolge, 7 bytes. Score: 3 - 1 = 2. Cracked.

D'<;_L"

Outputs 3.

(&a%M"o

Outputs 1.

edited Feb 2, 2022 at 7:48

answered Jan 31, 2022 at 10:46

Kamila Szewczyk

12.6k1 gold badge31 silver badges61 bronze badges

\$\begingroup\$ That's some Seedprogrammer craziness. \$\endgroup\$
– TwilightSparkle
Commented Jan 31, 2022 at 11:29
\$\begingroup\$ @null OH! thanks for the hint. \$\endgroup\$
– Kamila Szewczyk
Commented Jan 31, 2022 at 11:31
4

\$\begingroup\$ Lifetime honor: "@null" \$\endgroup\$
– TwilightSparkle
Commented Jan 31, 2022 at 11:32
3

\$\begingroup\$ Cracked!. That was not very easy. \$\endgroup\$
– Dominic van Essen
Commented Feb 2, 2022 at 0:16
\$\begingroup\$ @DominicvanEssen very cool! \$\endgroup\$
– Kamila Szewczyk
Commented Feb 2, 2022 at 7:47

| Show 2 more comments

pxeger · Accepted Answer · 2022-01-31 20:13:43Z

9

C, 24 bytes, score 33482810471

Output format is decimal.

main(){printf("%o",~9);}

Outputs 37777777766. Try it online!

main(){printf("%u",-1);}

Outputs 4294967295. Try it online!

Uncrackable?

edited Jan 31, 2022 at 20:13

answered Jan 31, 2022 at 17:49

pxeger

24.6k4 gold badges53 silver badges141 bronze badges

1

\$\begingroup\$ it's like here, often cracked by main(){printf("%o",.2);}, but not always. \$\endgroup\$
– user111777
Commented Apr 5, 2022 at 7:31

Add a comment |

Dominic van Essen · Accepted Answer · 2022-01-31 11:57:36Z

8

R, 5 bytes, score: 10^307

1e308

Try it online!

9e307

Try it online!

2e308 overflows R's numeric type, and outputs Inf, so I suppose that 1e308 is the highest number that we can output using 5 bytes.

R, 4 bytes, score: 9 x 10^98, cracked, almost instantly

1e99

Try it online!

1e98

Try it online!

Note after crack: Well, that was pretty stupid of me.

edited Jan 31, 2022 at 11:57

answered Jan 31, 2022 at 11:36

Dominic van Essen

36.4k2 gold badges22 silver badges60 bronze badges

\$\begingroup\$ Cracked but the question suggests to better make uncrackable solutions \$\endgroup\$
– l4m2
Commented Jan 31, 2022 at 11:40
1

\$\begingroup\$ @i4m2 - Oh, that was stupid of me. \$\endgroup\$
– Dominic van Essen
Commented Jan 31, 2022 at 11:41
2

\$\begingroup\$ Note that 3^ceiling(log(9e307,3)) (and variants) are bigger than 1e308, so those are dead ends. \$\endgroup\$
– Giuseppe
Commented Jan 31, 2022 at 15:39
\$\begingroup\$ @Giuseppe - Hm, so I was clearly wrong about 'the highest number that we can output using 5 bytes' then... \$\endgroup\$
– Dominic van Essen
Commented Jan 31, 2022 at 15:45
\$\begingroup\$ @Giuseppe - (and now I'm quite curious what would be the shortest expression that would output 1.797693e+308, assuming that this actually is the highest number that can be output in R...) \$\endgroup\$
– Dominic van Essen
Commented Jan 31, 2022 at 15:49

| Show 2 more comments

Luke Dunn · Accepted Answer · 2022-02-01 23:34:41Z

8

Excel, 10 bytes, score (145!)-(144!) 0 Cracked!

I'm interested to see how this can be cracked.

=FACT(145)

Outputs 8.04792605747199E+251 (actually prints every digit when in "Number" format and a very wide column/merged columns, the most I could get it to print before they became ##### or #NUM!

=FACT(144)

Outputs 5.55029383273931E+249 (again, actually prints every digit [although it does turn most to 0's])

But... if you think it's okay if I can use un-printable numbers (likely not)

Excel, 10 bytes, score (999999999!)-(999999998!)

=FACT(999999999)

Output is approximately 1e8448735636

=FACT(999999998)

Output is approximately (1e8448735636)/999999999

edited Feb 1, 2022 at 23:34

answered Feb 1, 2022 at 1:59

Luke Dunn

833 bronze badges

1

\$\begingroup\$ Welcome to Code Golf! Nice answer. \$\endgroup\$
– rydwolf
Commented Feb 1, 2022 at 2:13
\$\begingroup\$ Thanks! Can I post another answer for another language (C)? \$\endgroup\$
– Luke Dunn
Commented Feb 1, 2022 at 2:19
1

\$\begingroup\$ Sure! Posting multiple answers is fine unless the challenge specifically says not to, even in the same language if they're different enough. \$\endgroup\$
– rydwolf
Commented Feb 1, 2022 at 2:28
2

\$\begingroup\$ cracked! \$\endgroup\$
– Dominic van Essen
Commented Feb 1, 2022 at 10:41
2

\$\begingroup\$ (and I assume the dodgy un-printable one is a typo, otherwise surely =FACT(100000001) is a crack...?) \$\endgroup\$
– Dominic van Essen
Commented Feb 1, 2022 at 11:06

| Show 1 more comment

Neil · Accepted Answer · 2022-01-31 11:05:07Z

6

Charcoal, 2 bytes, score: 1000 - 99 = 901

Ｉφ

Outputs 1000. Try it online! Link is to verbose version of code.

Outputs 99. Try it online!

answered Jan 31, 2022 at 11:05

Neil

177k12 gold badges74 silver badges281 bronze badges

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caird coinheringaahin g · Accepted Answer · 2022-01-31 22:28:19Z

Jelly, \$1000 - 256 = 744\$, 1 byte

This is provably uncrackable. Our programs are

ȷ

Try it online!

and

⁹

Try it online!

These are the following one byte programs in Jelly that output a number:

¤¥¬®µ½×ðȷ !$&*+-.0123456789<=>ACEHLNOPSX^_aceghinoquvw|~°¹²³⁴⁵⁹⁻⁼ẠḄḌẸḤỊṂṆẒȦḂĊḞḢṀṠṪạḅḍịḳḷṇṛ§ẉỵẓȧċḋėġṅȯẇẏ«»‘’

Try it online!

The two largest outputs are \$1000\$ with ȷ, then \$256\$ with ⁹. Nothing else outputs something in between, and the empty program outputs 0.

lyxal · Accepted Answer · 2022-01-31 23:04:56Z

6

Vyxal 2.8.1, online edition, Score: \$no\$, 102 bytes - cracked

Our two programs are:

kḭkḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(kḭ(↵

which is equivalent to:

stack.append(4294967296)
for i in range(4294967296):
  for j in range(4294967296):
     for l in range(4294967296):
         ...
           stack.append(10 ** stack.pop())

and

k×k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(k×(↵

stack.append(2147483648)
for i in range(2147483648):
  for j in range(2147483648):
     for l in range(2147483648):
         ...
           stack.append(10 ** stack.pop())

These both output really big numbers, which I need to calculate. Online edition here means that it should be able to work on the online version of the interpreter if given enough resources and time.

edited Jan 31, 2022 at 23:04

answered Jan 31, 2022 at 11:42

lyxal

34.3k2 gold badges64 silver badges141 bronze badges

\$\begingroup\$ From the description this seems like it should be really easy to crack. Simply write a program which loops a set number of times each time applying ↵. Start at 8 and you should have plenty of room to add 1 at the end. But I don't know enough about lyxal to make this happen. \$\endgroup\$
– Wheat Wizard ♦
Commented Jan 31, 2022 at 12:30
\$\begingroup\$ @WheatWizard by the time you've set up the loop, you've already wasted a potential ↵ that could have been used instead \$\endgroup\$
– lyxal
Commented Jan 31, 2022 at 12:32
\$\begingroup\$ I'm pretty sure you can set up a loop in fewer than 1000 bytes giving you plenty of time to apply ↵ way more than the program which just naively applies ↵ repeatedly. There is just so much room. \$\endgroup\$
– Wheat Wizard ♦
Commented Jan 31, 2022 at 12:34
2

\$\begingroup\$ I doesn't know much about vyxal either bot doesn't something like eval("kḭ" + "kḭ("*98 + "↵")+1 is possible with fewer bytes in this language? \$\endgroup\$
– Jakque
Commented Jan 31, 2022 at 12:47
1

\$\begingroup\$ cracked codegolf.stackexchange.com/a/242091/103772 \$\endgroup\$
– Jakque
Commented Jan 31, 2022 at 13:49

| Show 3 more comments

pxeger · Accepted Answer · 2024-02-21 15:09:56Z

Zsh, 13 bytes, score \$ \approx 10^{(21 \times 10^6)} \$, cracked by lynn

tr<=go -c 9 9

Outputs 13061918 9s. Try it online!

tr<=z3 -c 1 1

Outputs 21366224 1s. Try it online!

Exact score:

$$ \frac{10^{21366225} - 1}9 - 10^{13061919} + 1 $$

Explanation

<=go: load the program go, as a file
tr -c 9 9: replace all characters except 9, with 9s

The other program is similar.

z3 and go are the largest 2-character programs available on TIO, at about 22MB and 14MB respectively. We can use them as an easy source of very long "strings", and by converting all the bytes to digits, very large numbers.

I used TIO instead of ATO because it has much bigger binaries available, and also because ATO is too frequently updated, changing the binaries, so the score would change over time.

I'm not intending for this to be cracked, but I haven't tried very hard to ensure there aren't any cracks.

\$\begingroup\$ Cracked \$\endgroup\$
– lynn
Commented Feb 20 at 20:37 — lynn, Commented Feb 20 at 20:37

Kamila Szewczyk · Accepted Answer · 2022-01-31 12:19:22Z

Seed 4791 bytes, 9^9^9^9^9^9^9^9^9^9^9 - 9^999

9^999:

36                                                                                                                                                                                                                                         94981479280208146944953816764699944095961978453221682715159791056688140996853888504437229889191975183564015323273899198344481103250895668467924054339223701930305051118652741561583994582158440585564368286547479926974178096702473601294217332487135194413906552257837173590043556058790275467394479137424662603752651645938216669070115921033298764330851330467996807939281657656425699237251690473743679487474871854542411596819130830481224340562767172942708101325192086341055751991333028615416686839981817142945819118242545846019740984523396598771709676467792891959285529685021033906795910583508008242630927336057598688291102981549916746769870319488733952651891371543582899041173842586806720961829689851873808965388202504531747804845840143327859796447099370149069303515672221742322125494895020945918848068614407697751238250677431155329740069260038983064746127731524766636439066019193467422893766041808161143968190057861269526918372578995949004970306694838999565427329694454909226376047136625534400886807619996259128667499478409012349612038652572951348047086088817551011308002652053644287503036935028935844715426527836055671911027719964392826069078969082698559771882396772799751373195780148811909716528980696256380945795001274573193459618177342958415946401666965464920052072906030975414694315792619540688825293711591412127002343225335880571865520167604325308977304908296745198902342257861540933487039862994356564924690417285711172056255742252487361407255067571158083586073346420212617420441279183030666063290178409730490381049078147916881460523911120507498436875929418470544681759185903900133455626013012351989728905311148323498044351461599265083429729804099930581137436822766380518345367947616841345549577232164529955502684122270790499052240935152809235771171370434070236688989688479953925955276348719434668321141480227864703028324596206817015011573827251621510788266231733052888294086085254666969188534237535939663347385652634046245668458458194635071661213214973469115822380087405654270393830651870914063112038485264582625501640551679797243637993058707669484199371425261416836151503596151478053438581656553121438841132537636618059562148278640553730409617733965555456279846109188629372980642417837804453861796471345795684171211276475918979481722058104857844758843603165344900677433585454487342231624372104550191735735796454388857238022368193594741972999621272782164771208619698294562775042889372442244124800173695001811951104483064798795939319310120564380578007164764614616015236574253569882284714066981102630472310220979239145467130016229967089894017391315803929147667149546926923076190028432304251122963960242247834461462078725734648747107996037476017483441942628448413731020112504750795380529669192191584807395775799602140589910229189049503739591898879818034929487479963008540786045617483659914745637538236332799035903698998398005069763801222822678189343269224348393728495631906613048781189537304930344768279627715649280517720235827779507044205103495831324708746293837927334289124220386247007983741488271118125085904363197981352562772119852399632426650691964453022658894369910133959424146640109164371294689079802777902307296880648093189854866622499839863241317182736088299334215289137396403643588453171937501380801955934324623689028726948232299713278675563351730787914169555473591390989160245212337001718142110638979369841824007070047204941161283902352728852331043554053279968108315668988738506810443190205259224591564532510273789237748335782790807545071073495745130501275790665780813262239133252704358246589268608658852890888957950256512957031746836236764704856568474359369600518287601870385217873471559723711460790851490641852774919778389159824024349093647531524452566965015853360104186115940302479291089022327363165427092882556283691659718308627299377279772911302647604701234001616842762253575818861145567617316017544857744939000573784180397907315361706557618352235994622697878150716754864959319585660748889125094235883962411794008488384621978956654775262754623280713877112553348864910614097062301093879722439179562871939066598227413212667524976059454125001698534620701802564422768614905506319489756942407153064671390062115508534001167416000467035978170537796335329422124742348973353594178675864912238921028339003101191208960656005489477745423235808264714405884454620918978113027106595440238470298437388674769792190539877475662105937286759309442118449241650440411271188409657695505912558859008915175033843314270463991607598704331221534023888995395090620691204768

This generates the following befunge programs:

 "cb 0=HTGNEL_ENIL_CB|'999^9' ohce"=@

Thanks to @null for reminding me I know how to program Seed.

The second program becomes:

53 309587622060800553797768779768494911841628261184767731489332912878541825672886566188681588715091427880831872903145865614752063676670384244697938284581157766493625127486069966517483807267622940281840537784840565165614923074081025668091978619573378790644656852906050466371773524417205893183522285682501264293869247195711547240624794051171506566110127196684091043263704047601080904572252690239932534180485242573593166277713560062201443018547580753558753076249237708886730792578837512812594738578149293808173180907025198002544953022811343070481719591552371661589667292782400655709462087966594005437890287977681252692413309430402819975448488893242566687723971049600796250960915479240241523929324115544908597729425622791811471173026530746268048270787941195246863033941763322474063945991208609412842541131320624405655371178829432647519162966803019160693234110850310536828203057708491223327429158504206916042083919635627816797751112595799425150793221319690691484648035817244488524453691950153293122568235889159354407000681042368350613187209832365401659548342971503410960096851577419002008732886164772578445903853439006453593714967313295474365940623318333595448104799161502690614815839414921869269173019141656145770493252423864457874164529445010976172453560422794168628767033007798464857807868972770119452458362389906963282436285266581231736927418149622919396524509045600877152139736196549699718010709692427212834211798096407951361607408561365539352799316609116886495092220026475056054004109655559238156190632938794875725763241934373532462961173950124119350519950416535961630182879968505149425984423718446515752555953370146281257558975704887791656829772389610358616172108023688683194195646087461491617635517077426354405251289450350884001525808934031920441467238068082960111819700136750591936811451950869796830795917902563838207457238199783664676631034747422610392737824936385217739329722785171995265543924626358418544733893242621181268907981435590946535967453087735571432009511302485790035630081692234070829135516653019636470143030262426164209059107313322273527988454852167740639604116654661106183147469766915633812512660623654733210776980513357988371975078629660700128024350111565369418799322994425194707442766131638194451296869655903560930552909726193906116203105280133098173487874636694252312563326834465786203019871459621428412218125660006856353034700431931551987177749720765277804188429325209144778878250052168648774014287051224303669581052487796035601212899803091980714662821531796312403019296375399485542097354585848372838776512451340890861805997089465652085241774190551963641174852103085029950949878525880282522636862689978529309241328139079974474498840789713396190657697469158669210302848644464901861283874879947038142675120700972350655160123482902871840054575564022314230414143498863246180321421107093159843511652846289238887904021891711361912352395752690348787554827002831376719081050720410310253594459120692911078678989959842508193061754966247315287630553272097166145570047781427011192833631466194493500860462029105164607250519256275264184570393514673731241768380866974597977047998254748735616785609554132052392767706860844358763762550597658505611387104158401413665230304581335849536972107107380977005367190725149287488469722296267278310609063864272116083546208401737358229303260037829564529791746229429584305623876048177048606434240808955564817647762135226292996457376569825840317487337230342808888439404782377044367241171285682843079144996791352785027653912966489528982369346460394462814510925432325649339476445012957862795528485420766725202232921562144249478994398630291247115812027459339439917745701011664764129641934911394405527525162982448137755434800132266423495736646406665020110921399145992639873000772187319349501446035997970338236156282496731462537470287250998341901639931110985832053143995593295587994998629729807528492791923904555457866017778430904246471024077597359827409642434169201834219584106992783524218181235229797375275600542981388826320938305229269139948945723602080721878638825973118853705899013952011812734028557886010265443351247058659869796789367980202658727913440606028570394873456111539589719778807886159735916680268655045949064003143304502567591948483646514438384066523522818325855415617165015245093826574834982063177898711249371505888565014662311628585433493237461213627490980308832056414074306954654643982609793175536357731519819711214704220198179035754939835716988611721494310455897591499137450735143359976295914194929864424760941191508944873123510109598842071064171881097121958831073339652141908077795821260390971306588642697066016462777462135092080108211612548519054989094919411477432604519350786361891036501628076178403464320215611778222267688190891672404404679274514697484921192422288645990934995323948756777118204678605373179302677235930726235223857

The first one can be padded with spaces to it's length. It expands to the following:

"cb 0=HTGNEL_ENIL_CB|'9^9^9^9^9^9^9^9^9^9^9' ohce"=@

The score:

\$10^{10^{10^{10^{10^{10^{10^{10^{10^{8.567841344463465}}}}}}}}}\$

@WheatWizard it's a mildly theoretical submission. It's just bc doing all the computations behind the hood, judging by the Befunge code it generates. You probably don't have enough memory to generate the bigger number. — Kamila Szewczyk, Commented Jan 31, 2022 at 12:34
@WheatWizard you didn't crack my answer, I wrote this code. I don't think it's fair to claim it under your name. If anything, I cracked my solution myself. (accidentally) — Kamila Szewczyk, Commented Jan 31, 2022 at 12:52
You didn't crack it :). And I refuse to acknowledge the crack. — Kamila Szewczyk, Commented Jan 31, 2022 at 12:58
I agree with Wheat Wizard here that this answer is cracked since there is a program that fulfills the requirements of cracking it. It acknowledges Kamila as the cracker, which is fine. — justhalf, Commented Feb 2, 2022 at 18:29

math scat · Accepted Answer · 2022-01-31 14:04:35Z

4

Brainf*ck, 25 bytes. Score = 7 - 4 = 3, cracked by Fmbalbuena

>>+++++[<+++++++++++>-]<.

^ Outputs 7

>++++[<+++++++++++++>-]<.

^ Outputs 4

I just learned Brainf***, I think it's going to be an easy crack.

edited Jan 31, 2022 at 14:04

answered Jan 31, 2022 at 13:52

math scat

9,4681 gold badge20 silver badges83 bronze badges

\$\begingroup\$ For future reference :) \$\endgroup\$
– Dom Hastings
Commented Jan 31, 2022 at 14:02
\$\begingroup\$ Cracked! \$\endgroup\$
– Fmbalbuena
Commented Jan 31, 2022 at 14:02
\$\begingroup\$ @DomHastings Oh, thanks. \$\endgroup\$
– math scat
Commented Jan 31, 2022 at 14:03
2

\$\begingroup\$ I hope you took that the way it was intended! It was truly about sharing knowledge, it's not something I'd seen until I'd played with BF a lot so thought it might be useful to you! \$\endgroup\$
– Dom Hastings
Commented Jan 31, 2022 at 14:07
\$\begingroup\$ @DomHastings Nice, searched for a bit on google if there are any shorter approaches, but didn't find anything, thanks. \$\endgroup\$
– math scat
Commented Jan 31, 2022 at 14:16

Add a comment |

Fatalize · Accepted Answer · 2022-01-31 12:57:31Z

3

Brachylog, 5 bytes, score = 61803398875 - 14159265359 = 47644133516

φṫb₂ị

Try it online!

πṫb₂ị

Try it online!

Explanation

Not sure this is crackable:

φ        Take Phi = 1.61803398875
π        Or Pi = 3.14159265359
 ṫ       Convert to string
  b₂     Remove the first digit and the decimal separator
    ị    Convert back to integer

answered Jan 31, 2022 at 12:57

Fatalize

39.3k5 gold badges70 silver badges162 bronze badges

1

\$\begingroup\$ Cracked? \$\endgroup\$
– Kevin Cruijssen
Commented Jan 31, 2022 at 16:24

Add a comment |

Kevin Cruijssen · Accepted Answer · 2022-01-31 15:04:22Z

3

MathGolf, 1 byte, score 100000000-10000000=90000000

100,000,000: ↕
10,000,000: ◄

Try it online.

I would be surprised if this is crackable..

answered Jan 31, 2022 at 15:04

Kevin Cruijssen

131k13 gold badges144 silver badges384 bronze badges

1

\$\begingroup\$ I read the source and saw random.seed(1) and hoped, but v + --unittest couldn't save me... \$\endgroup\$
– Dom Hastings
Commented Jan 31, 2022 at 15:47

Add a comment |

AnttiP · Accepted Answer · 2022-02-01 20:22:06Z

3

Python 3, 63 bytes, score \$2\rightarrow12\rightarrow(9^{99}-1)-2\rightarrow11\rightarrow(9^{99}-1)\$

Program 1:

A=lambda m,n:m and A(m-1,n<1or A(m,n-1))or-~n
print(A(9**99,8))

Try it online!

Program 2:

A=lambda m,n:m and A(m-1,n<1or A(m,n-1))or-~n
print(A(9**99,9))

Try it online!

This just calculates the difference between two nearby invocations of the Ackermann function.

answered Feb 1, 2022 at 20:22

AnttiP

7,91815 silver badges61 bronze badges

1

\$\begingroup\$ I'm getting a recursion error? infinite recursion for both... \$\endgroup\$
– 12944qwerty
Commented Feb 1, 2022 at 22:04
\$\begingroup\$ @12944qwerty They give a recursion error because Python (nor any language on any computer) cannot actually practically compute A(9*99,8); it's too large a number \$\endgroup\$
– pxeger
Commented Feb 2, 2022 at 13:13

Add a comment |

l4m2 · Accepted Answer · 2022-01-31 17:19:26Z

2

JavaScript (Node.js), 22 bytes, Score=\$\frac 19\times 10^{10000000}-\frac 19\$, cracked

x=>'8'.repeat(9999999)

x=>'9'.repeat(9999999)

Try it online!

brainfuck, 19 bytes, Score=\$3\times 10^{254}\$, unlikely crackable

+[+++++>+<]+[>.<+]

+[+++++>+<]++[>.<+]

Try it online!

edited Jan 31, 2022 at 17:19

answered Jan 31, 2022 at 11:36

l4m2

28.3k2 gold badges25 silver badges103 bronze badges

\$\begingroup\$ p.s. I have no solution for this \$\endgroup\$
– l4m2
Commented Jan 31, 2022 at 11:41
\$\begingroup\$ Both programs must be the same size. The first one is only 18 bytes? \$\endgroup\$
– Dingus
Commented Jan 31, 2022 at 11:47
\$\begingroup\$ @Dingus Add space if you like \$\endgroup\$
– l4m2
Commented Jan 31, 2022 at 11:57
1

\$\begingroup\$ What's the second JavaScript program? \$\endgroup\$
– ophact
Commented Jan 31, 2022 at 12:18
1

\$\begingroup\$ Cracked: codegolf.stackexchange.com/a/242097/106710 \$\endgroup\$
– ophact
Commented Jan 31, 2022 at 14:42

| Show 2 more comments

bigyihsuan · Accepted Answer · 2022-02-02 20:10:58Z

Lexurgy, score \$11111111111111111\$, 121 bytes

Both programs use the following method:

Output a string of 26 digits
Make 16 copies of those digits and append them to the end.

Program 1:

Outputs 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999988888888888888888 (425 9s then 17 8s).

a:
*=>\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\8
b:
[]$1=>$1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1

Program 2:

Outputs 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 (442 9s).

a:
*=>\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9\9
b:
[]$1=>$1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1 $1

Minimal answer: score \$9-8=1\$, 8 bytes

# program 1
a:
*=>\8
# program 2
a:
*=>\9

Fmbalbuena · Accepted Answer · 2022-02-02 18:33:18Z

1

!@#$%^&*()_+, 6 bytes, score: 1001001, Cracked by emanresu

(#)

The first three bytes are char code 127.

Try it online!

~~~(#)

Try it online!

You can't see the solution, But this is easy

edited Feb 2, 2022 at 18:33

answered Feb 2, 2022 at 18:19

Fmbalbuena

4,2651 gold badge10 silver badges52 bronze badges

\$\begingroup\$ codegolf.stackexchange.com/questions/242076/… \$\endgroup\$
– emanresu A
Commented Feb 2, 2022 at 18:32
\$\begingroup\$ @emanresuA Good crack \$\endgroup\$
– Fmbalbuena
Commented Feb 2, 2022 at 18:33

Add a comment |

robbie crockett · Accepted Answer · 2022-02-07 20:55:48Z

1

MATLAB, 1.797693e+308 - 1.797047e+308 = 6.463132e+304, 7 bytes

realmax

outputs 1.797693e308

5175^83

outputs 1.797047e+308

Try it online!

edited Feb 7, 2022 at 20:55

answered Feb 3, 2022 at 15:56

robbie crockett

5823 silver badges5 bronze badges

\$\begingroup\$ I think this is easily cracked by 1e10 -- also you can use Octave for a close approximation to MATLAB. MATL is based on MATLAB but is a very different language! \$\endgroup\$
– Giuseppe
Commented Feb 3, 2022 at 15:59
\$\begingroup\$ Updated to fix that, and hopefully made it harder to crack \$\endgroup\$
– robbie crockett
Commented Feb 3, 2022 at 16:15
1

\$\begingroup\$ cracked! \$\endgroup\$
– Giuseppe
Commented Feb 3, 2022 at 16:22
\$\begingroup\$ Try again! good luck \$\endgroup\$
– robbie crockett
Commented Feb 3, 2022 at 19:08

Add a comment |

DialFrost · Accepted Answer · 2022-02-02 13:58:30Z

0

Python3, 41 bytes, score=\$2.82×10^{456573}-2.82×10^{446573}\$, Cracked

import math
print(math.factorial(100000))

Try it online!

import math
print(math.factorial(99999))

Try it online!

This is embarrassing i forgot that you can just do 3*10**456573

edited Feb 2, 2022 at 13:58

answered Feb 2, 2022 at 13:19

DialFrost

5,1072 gold badges12 silver badges54 bronze badges

\$\begingroup\$ Cracked? \$\endgroup\$
– 12944qwerty
Commented Feb 2, 2022 at 13:53
\$\begingroup\$ By the way, the lengths of the programs are different from each other. They should be the same. \$\endgroup\$
– ophact
Commented Feb 3, 2022 at 9:34

Add a comment |

score 0 · Accepted Answer · 2022-04-05 10:11:53Z

0

PHP4, score ≈ 0.011 × 10^1000

Program 1 (23 chars) output 999 times 9 :

echo str_repeat(9,999);

Program 2 (23 chars) output 999 times 8 :

echo str_repeat(8,999);

Output of both PHP4 scripts is a 999 digits integer in decimal form.

var_dump(chop($out_1, '0..9') === ''); // bool(true)
var_dump(chop($out_2, '0..9') === ''); // bool(true)

BC Math is only available if PHP was configured with --enable-bcmath, by default there is not.

edited Apr 5, 2022 at 10:11

answered Apr 5, 2022 at 8:29

user111777

Add a comment |

Dannyu NDos · Accepted Answer · 2024-10-17 03:01:35Z

0

Haskell (ghci), 3 bytes, score = 423

4^7

Prints 16384.

7^5

Prints 16807.

edited Oct 17 at 3:01

answered Oct 17 at 2:55

Dannyu NDos

6,6091 gold badge25 silver badges81 bronze badges

\$\begingroup\$ Can't you just do 9^9 and 9e9? \$\endgroup\$
– emanresu A
Commented Oct 17 at 4:42
\$\begingroup\$ @emanresuA Using XeY, the best bet would be 8e9 and 9e9. \$\endgroup\$
– Bubbler
Commented Oct 17 at 4:46

Add a comment |

Stack Exchange Network

Output two numbers (Cops' thread)

Haskell, \$9-7 = 2\$, 12 bytes

Scoring

21 Answers 21

Zsh, 1 byte, score 124, provably uncrackable

Malbolge, 7 bytes. Score: 3 - 1 = 2. Cracked.

C, 24 bytes, score 33482810471

R, 5 bytes, score: 10^307

R, 4 bytes, score: 9 x 10^98, cracked, almost instantly

Excel, 10 bytes, score (145!)-(144!) 0 Cracked!

Excel, 10 bytes, score (999999999!)-(999999998!)

Charcoal, 2 bytes, score: 1000 - 99 = 901

Jelly, \$1000 - 256 = 744\$, 1 byte

Vyxal 2.8.1, online edition, Score: \$no\$, 102 bytes - cracked

Zsh, 13 bytes, score \$ \approx 10^{(21 \times 10^6)} \$, cracked by lynn

Explanation

Seed 4791 bytes, 9^9^9^9^9^9^9^9^9^9^9 - 9^999

Brainf*ck, 25 bytes. Score = 7 - 4 = 3, cracked by Fmbalbuena

Brachylog, 5 bytes, score = 61803398875 - 14159265359 = 47644133516

Explanation

MathGolf, 1 byte, score 100000000-10000000=90000000

Python 3, 63 bytes, score \$2\rightarrow12\rightarrow(9^{99}-1)-2\rightarrow11\rightarrow(9^{99}-1)\$

JavaScript (Node.js), 22 bytes, Score=\$\frac 19\times 10^{10000000}-\frac 19\$, cracked

brainfuck, 19 bytes, Score=\$3\times 10^{254}\$, unlikely crackable

Lexurgy, score \$11111111111111111\$, 121 bytes

Program 1:

Program 2:

Minimal answer: score \$9-8=1\$, 8 bytes

!@#$%^&*()_+, 6 bytes, score: 1001001, Cracked by emanresu

MATLAB, 1.797693e+308 - 1.797047e+308 = 6.463132e+304, 7 bytes

Python3, 41 bytes, score=\$2.82×10^{456573}-2.82×10^{446573}\$, Cracked

PHP4, score ≈ 0.011 × 10^1000

Haskell (ghci), 3 bytes, score = 423

Your Answer

Not the answer you're looking for? Browse other questions tagged
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cops-and-robbers
busy-beaver
or ask your own question.

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Hot Network Questions

Output two numbers (Cops' thread)

Haskell, \$9-7 = 2\$, 12 bytes

Scoring

21 Answers 21

Zsh, 1 byte, score 124, provably uncrackable

Malbolge, 7 bytes. Score: 3 - 1 = 2. Cracked.

C, 24 bytes, score 33482810471

R, 5 bytes, score: 10^307

R, 4 bytes, score: 9 x 10^98, cracked, almost instantly

Excel, 10 bytes, score (145!)-(144!) 0 Cracked!

Excel, 10 bytes, score (999999999!)-(999999998!)

Charcoal, 2 bytes, score: 1000 - 99 = 901

Jelly, \$1000 - 256 = 744\$, 1 byte

Vyxal 2.8.1, online edition, Score: \$no\$, 102 bytes - cracked

Zsh, 13 bytes, score \$ \approx 10^{(21 \times 10^6)} \$, cracked by lynn

Explanation

Seed 4791 bytes, 9^9^9^9^9^9^9^9^9^9^9 - 9^999

Brainf*ck, 25 bytes. Score = 7 - 4 = 3, cracked by Fmbalbuena

Brachylog, 5 bytes, score = 61803398875 - 14159265359 = 47644133516

Explanation

MathGolf, 1 byte, score 100000000-10000000=90000000

Python 3, 63 bytes, score \$2\rightarrow12\rightarrow(9^{99}-1)-2\rightarrow11\rightarrow(9^{99}-1)\$

JavaScript (Node.js), 22 bytes, Score=\$\frac 19\times 10^{10000000}-\frac 19\$, cracked

brainfuck, 19 bytes, Score=\$3\times 10^{254}\$, unlikely crackable

Lexurgy, score \$11111111111111111\$, 121 bytes

Program 1:

Program 2:

Minimal answer: score \$9-8=1\$, 8 bytes

!@#$%^&*()_+, 6 bytes, score: 1001001, Cracked by emanresu

MATLAB, 1.797693e+308 - 1.797047e+308 = 6.463132e+304, 7 bytes

Python3, 41 bytes, score=\$2.82×10^{456573}-2.82×10^{446573}\$, Cracked

PHP4, score ≈ 0.011 × 10^1000

Haskell (ghci), 3 bytes, score = 423

Your Answer

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