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The challenge involves mathematics. Also consider using more specific tags: [number] [number-theory] [arithmetic] [combinatorics] [graph-theory] [geometry] [abstract-algebra].

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Haskell - 105 import Data.List main=do x<-getLine putStrLn.intercalate", ".map show$filter((1==).gcd(read x))[2..100] Quite obvious if you can understand Haskell. :)
answered Jun 1 '14 by johnchen902
7
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Brainfuck + [ [->+>+<<] > [-<+>] <+ ] -------------------------------------------------------------------------------- Evaluate $\sum_{i=1}^\infty i$ ------------------------------------------------- …
answered May 27 '14 by johnchen902