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Collatz Conjecture Logo

Independant: Jon Sonntag

Collatz Conjecture is based in Wood Dale, Illinois. It is a privately managed BOINC project attempting to disprove the Collatz Conjecture.

The Collatz conjecture is a conjecture in mathematics that concerns a sequence defined as follows: start with any positive integer n. Then each term is obtained from the previous term as follows: if the previous term is even, the next term is one half the previous term. Otherwise, the next term is 3 times the previous term plus 1. The conjecture is that no matter what value of n, the sequence will always reach 1.

The conjecture is named after Lothar Collatz, who introduced the idea in 1937, two years after receiving his doctorate. It is also known as the 3n + 1 conjecture, the Ulam conjecture (after Stanisław Ulam), Kakutani's problem (after Shizuo Kakutani), the Thwaites conjecture (after Sir Bryan Thwaites), Hasse's algorithm (after Helmut Hasse), or the Syracuse problem; the sequence of numbers involved is referred to as the hailstone sequence or hailstone numbers (because the values are usually subject to multiple descents and ascents like hailstones in a cloud), or as wondrous numbers.

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Project Statistics


Project Total Credit Project Compute Speed (GFlops)
1981227005536 14902066
Project Avg Daily Credit (7 Day) Project Avg Daily Credit (40 Day)
2489630000 2813320000
W.A.S (Work Availability Score) Z.C.D (Zero Credit Days)
0.88 2
Last Stats Update
2018-12-16 22:42:11

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Project News Feed

New Windows 64-bit version

Sat, 12 May 2018 21:09:12 GMT

A new version (1.40) of the Windows 64-bit CPU application has been released.

Linux Apps Avaliable

Mon, 07 May 2018 22:19:23 GMT

Linux versions of the Collatz Sieve application are now available. This includes 32 and 64 bit versions of the cpu apps, ATI OpenCL, Intel OpenCL, and nVidia OpenCL apps.

Use at your own risk

Wed, 18 Apr 2018 04:53:08 GMT

I'm testing the validator, work generator, assimilator, and applications. It may or may not work which means you may or may not get credit for your work. There is still a lot of work to do but I'm making progress.