YAFU (http://yafu.dyndns.org/yafu/) is a alpha project, which main goal is it to test the latest Boinc server code for bugs. Please report any error which you find in the webpages in the forum.
In parallel to this it factorize numbers of 80-110 digit length which needs to be factored.

The project is run by Yoyo of the Yoyo@home.