this literally just tries to brute force 3x+1 (also known as the Collatz conjecture) if you don't know, 3x+1 is a mathematical problem whereby if a number is odd, it is multiplied by three and 1 is added, and if it's even, it's divided by 2. most (probably all) numbers eventually get stuck into a loop of going 4, then 2, then 1. the goal is to find a number that doesn't do that.
