Collatz Sequence Calculator

Run the Collatz sequence from any starting integer and find the number of steps to reach one and the highest value reached

Frequently Asked Questions

What is the Collatz conjecture?

It states that if you repeatedly halve even numbers and triple-plus-one odd numbers, any positive starting integer eventually reaches one. It has been verified for enormous ranges of numbers but remains mathematically unproven.

Why does the number 27 take so long?

Starting from 27, the sequence climbs to a peak above nine thousand and takes over a hundred steps before settling to one. Small starting numbers can produce surprisingly long and high sequences, which is part of the puzzle's appeal.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.