Collatz calculator - Adil Hanney

The Collatz conjecture

is the conjecture that the Collatz sequence always reaches 1. The sequence is defined by starting with some integer $n$ ₀ and performing the following operations repeatedly:

• If $n$ is odd, the next $n$ is $3n+1$ .

• If $n$ is even, the next $n$ is $n÷2$ .

No-one has been able to prove the conjecture yet, so this calculator lets you try out any number to check if it reaches 1! As of 2020, the conjecture has been tested up to 2⁶⁸ (295,147,905,179,352,825,856) ^[source].
You can use this calculator to test any number you want.

The Collatz conjecture

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Collatz calculator

The Collatz conjecture

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{n0}