What is YAFU?

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

User of the Day

User profile Profile Andi_HB
Hi @ all! I`m living in Bremen (Germany). My Hobby`s are biking, soccer and walking through the forest with my children. Enjoy the factoring with...

News

Aliquot sequence 3828928 has terminated!!!

28 Oct 2026, 19:40:46 UTC · Discuss


Aliquot sequence 3719628 has terminated!!!

26 Oct 2026, 18:01:07 UTC · Discuss


Aliquot sequence 3772368 has terminated!!!

26 Sep 2026, 20:42:44 UTC · Discuss


Aliquot sequence 3833886 has terminated!!!

23 Sep 2026, 18:19:50 UTC · Discuss


Aliquot sequence 3662904 has terminated!!!

20 Sep 2026, 14:32:20 UTC · Discuss


... more

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