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gcwsieve

gcwsieve is a sieve for Generalised Cunningham/Woodall numbers n*b^n+/-1. For nmin <= n <= nmax and prime factors p in pmin <= p <= pmax these limits may apply:

nmax < 2^32, b < 2^32, pmax < 2^51

The main gcwsieve program requires an existing sieve file in ABC format and can only find those factors p where p > max(b,nmax). To create the initial sieve file and remove factors p <= max(b,nmax) use either Mark Rodenkirch's MultiSieve program, or the gcwsieve-smallp program.

SelectionFile type iconFile nameDescriptionSizeRevisionTimeUser
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Download
Latest binaries (General use)  94k v. 1 Nov 1, 2009, 4:44 PM Geoffrey Reynolds
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Download
Small-p binaries (Use only to start a new sieve)  100k v. 2 Nov 1, 2009, 4:47 PM Geoffrey Reynolds
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Download
Latest source  138k v. 2 Nov 1, 2009, 4:44 PM Geoffrey Reynolds
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Download
BOINC binaries (For use as BOINC client only)  294k v. 2 Nov 1, 2009, 4:47 PM Geoffrey Reynolds
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