From the PrimeGrid Website:
PrimeGrid is currently running two sub-projects:
- Primegen: generating a public sequential prime number database.
- Twin Prime Search (testing): searching for large twin primes of the form k*2n 1 and k*2n - 1.
PrimeGrid is running PerlBOINC server software. PerlBOINC an attempt to implement
BOINC server system in Perl programming language.