The Collatz conjecture is also known as the "3n + 1" problem. It's an easy problem to explain and check, and has been tested up into the nineteen figure range. But it's only now that anyone has come forward claiming a proof that it always works. »6/21/11 7:00am 6/21/11 7:00am
Kinja is in read-only mode. We are working to restore service.