Originally Posted by
hhh
If you have a 24/7 internet connection, I guess BOINC is your choice. You will get BOINC credit.
If you have more of a standalone-PC, you should prefer manual sieving. If you are concerned about credit, you need in this case to get a username for the semiautomatic reservation system, for PSP (post a message in the mersenneforum-->PSP-->join-a-team thread), and at SoB (forgot how that works). You will submit factors at PSP, at SoB, and get separate credit.
Did that help? H.