We have opened Generalized Cullen Woodall sieve in BOINC to do new sieving work for the upcoming GCW move from PRPNet to BOINC in early 2017. The sieve for GCW was previously a manual effort. The sieve comes with an all new badge and user statistics.
We're searching for the first known Generalized Cullen prime in each of 14 bases. Once a Prime is found work on that Base will cease. Sieving makes the up and coming LLR work more efficient by removing candidates that have factors and so can't be Prime.
For more information, or to discuss the GCW Sieve, please see this forum thread.