The Collatz Conjecture is a math problem. You take any number, and if it's odd, you x3 then +1, but if it's even you Divide it by 2. Eventually all numbers loop back into the pattern of 4, 2, 1. There are videos that explain it better, and show extra stuff. Click right arrow to see the next number. The 'Steps' counter keeps track of how many numbers the number you chose went through before reaching 1.
Only goes up to 999,999,999 for now.