The Sieve work is less cpu intensive than the LLR work. I usually run the PsP sieve, it pays good too.

mike

This is true, the sieve apps run cooler than the LLR apps. If you're not interested in finding primes (LLR apps), then the sieves are the place to be. They also benefit from having 64 bit support which earns more credit. There currently are 3 sieve projects to choose from:

321 Prime Search Sieve (321)

Prime Sierpinski Problem Sieve (PSP)

Proth Prime Search Sieve (PPS)

Additionally, the AP26 app has shown to be cooler than the LLR's and it too has 64 bit support.