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 2008-12-30, 20:24 #34 Cruelty     May 2005 2×809 Posts 1.37-1.38M complete, reserving 1.38-1.39M
 2009-02-21, 17:49 #35 Cruelty     May 2005 2×809 Posts complete till 1.4M, reserving 1.4M-1.45M
 2009-07-17, 20:36 #36 Cruelty     May 2005 2·809 Posts complete till 1.45M, reserving 1.45M-1.5M
 2009-10-19, 13:16 #37 Cruelty     May 2005 2·809 Posts reserving 1.5M-1.51M
 2009-12-18, 22:47 #38 Cruelty     May 2005 31228 Posts complete till n=1.51M, reserving 1.51M - 1.55M
 2010-02-13, 09:15 #39 Cruelty     May 2005 2×809 Posts Reserving 1.55 - 1.56M
 2010-04-06, 17:28 #40 Cruelty     May 2005 2·809 Posts complete till n=1.56M, reserving 1.56M - 1.6M
 2010-08-05, 20:29 #41 Cruelty     May 2005 110010100102 Posts complete till n=1.6M, reserving 1.6M - 1.66M
 2010-12-30, 23:56 #42 Cruelty     May 2005 2·809 Posts complete till n=1.66M, reserving 1.66M - 1.7M
 2011-01-20, 13:15 #43 Cruelty     May 2005 161810 Posts Well, here comes 6-th largest PRP @ 502485 digits ;-) (2^1669219-2^834610+1)/5 is 5-PRP, originally found using LLR ver.3.8.4 for Windows (no factor till 2^54). This is a Fermat PRP at base 3, 5, 7, 11, 13, 31, 101, 137 - confirmed with PFGW ver.3.4.4 for Windows (32-bit). Additionally using the following command with PFGW: pfgw -l -tc -q(2^1669219-2^834610+1)/5 I've received the following result: Code: Primality testing (2^1669219-2^834610+1)/5 [N-1/N+1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 2 Running N-1 test using base 5 Running N-1 test using base 7 Running N-1 test using base 11 Running N-1 test using base 19 Running N-1 test using base 29 Running N+1 test using discriminant 37, base 2+sqrt(37) Calling N-1 BLS with factored part 0.02% and helper 0.00% (0.07% proof) (2^1669219-2^834610+1)/5 is Fermat and Lucas PRP! (229144.7431s+0.0642s)
 2011-07-17, 16:33 #44 Cruelty     May 2005 31228 Posts complete till n=1.7M, reserving 1.7M - 1.77M

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