I believe the reason thqt so few people use the factoring is because of the difficulty of the interface. If it were to have a easy to use interface such as download the program, click the icon, select a range and go then many moer people would be participating. Also since I don't believe the link on the co-ordination thread gives out an up to dat .dat file or even the newest version of prime 95's factoring code many people shy away from this sub-project. I would surely be doing some factoring on my P4s if not for these complications.