YAFU's goal is to factorize numbers up to 149 digit length which are needed to bring Aliquot Sequences to a size of at least 155. You can participate by downloading and running a free program on your computer.
The project runs without any funding and I'm happy about each donation. Join YAFU The invitation code for creating new accounts is yafu

Neil Polson
Hej, I'm a Brit living in Sweden. Met a Swedish girl in Ibiza in '95 and .......WOW!! I'm interested in Astronomy/Space and am an avid indoor...

Aliquot sequence 3806808 has terminated!!!

13 Aug 2026, 20:11:38 UTC · Discuss

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Aliquot sequence 2650158 has terminated!!!

29 Jul 2026, 16:56:11 UTC · Discuss

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Aliquot sequence 2086050 has terminated!!!

24 Jul 2026, 5:42:10 UTC · Discuss

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Aliquot sequence 3677934 has terminated!!!

23 Jul 2026, 5:58:56 UTC · Discuss

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Aliquot sequence 3741750 has terminated!!!

12 Jun 2026, 18:44:13 UTC · Discuss

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