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Old 2020-11-16, 22:35   #4
Dylan14's Avatar
Mar 2017

2·172 Posts

If you are sieving k*2^n-1 you should consider using mtsieve, which has a sieve called fbncsieve which can sieve this form faster than newpgen (and it's multithreaded too).

Anyway, to answer your question, you'll want to stop sieving when the time it takes to test a candidate with pfgw or LLR is equal to the time it takes to remove a term from the sieve file.
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