This page is about Syracuse numbers, also called 3n+1 conjecture (or Collatz conjecture): let's start with any integer number N,
and apply following simple rules : if N is even N=N/2, if not N=3N+1. It seems that N will always drop to 1...but is it true for *any* value of N???

With this page you can try to find a new record (or a N value proving this conjecture is false) by using any starting N as big as you want : enter a value, and click on the button "go for syracuse". You can also automatically search for records by choosing N and clicking on "search for max height" or "search for max length" buttons, good luck :)

Hint: «All numbers up to 2^{69} (590.295.810.358.705.651.712) [21 digits] have been checked once for convergence.» [1]