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Old 2008-12-30, 20:24   #34
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1.37-1.38M complete, reserving 1.38-1.39M
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Old 2009-02-21, 17:49   #35
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complete till 1.4M, reserving 1.4M-1.45M
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Old 2009-07-17, 20:36   #36
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complete till 1.45M, reserving 1.45M-1.5M
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Old 2009-10-19, 13:16   #37
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reserving 1.5M-1.51M
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Old 2009-12-18, 22:47   #38
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complete till n=1.51M, reserving 1.51M - 1.55M
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Old 2010-02-13, 09:15   #39
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Reserving 1.55 - 1.56M
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Old 2010-04-06, 17:28   #40
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complete till n=1.56M, reserving 1.56M - 1.6M
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Old 2010-08-05, 20:29   #41
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complete till n=1.6M, reserving 1.6M - 1.66M
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Old 2010-12-30, 23:56   #42
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complete till n=1.66M, reserving 1.66M - 1.7M
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Old 2011-01-20, 13:15   #43
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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)
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Old 2011-07-17, 16:33   #44
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complete till n=1.7M, reserving 1.7M - 1.77M
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