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 140. 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 Beyond
I'm retired and DC is one of my hobbies along with marathon canoe racing and XC skiing. In the work world was a network manager and most recently a...

News

Aliquot sequence 21546 has terminated!!!
The sequence 21546 has terminated with the amicable pair 1184/1210. It is the smallest discovered terminated sequence since 2012 and the first terminated sequence below 10e5 since 2020. The largest term of this sequence reaches 153 digits which is a new record.


24 Mar 2024, 7:12:35 UTC · Discuss


Aliquot sequences 2772150 and 2771604 have terminated!!!




14 Mar 2024, 17:20:46 UTC · Discuss


Aliquot sequence 2930256 has terminated!!!


26 Feb 2024, 17:30:04 UTC · Discuss


Aliquot sequence 2772150 has terminated!!!


16 Feb 2024, 18:36:25 UTC · Discuss


Aliquot sequence 2771604 has terminated!!!


15 Feb 2024, 19:53:58 UTC · Discuss


... more

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