In this cops-and-robbers challenge cops will think of a positive integer. They will then write a program or function that outputs one value when provided the number as input and another value for all other positive integer inputs. Cops will then reveal the program in an answer keeping the number a secret. Robbers can crack an answer by finding the number.
Your job as robbers is to find that number. Once found you can make an answer here detailing the number and how you found it. You should link the original answer being cracked in your answer.
Your score will be the number of cracks with more being better.