is 2 87601777 - 1
has 26370763 decimal digits
takes 295.332 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual276174.699664.4737 %710000138450006.96903.4880 %181.668665.7128 %
Target27587.348864.0000 %60000010000000029.40654.0438 %116.755365.4558 %
Difference+1+87.3508+0.4737 %+110000-86155000-22.4374-0.5558 %+64.9134+0.2571 %

Known prime factors (1 factor, 81.6 bits, 0.00009318% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8760177737392324690656851670043672581.62921342218143963479
3 × 7 × 3457 × 149113 × 1971539
2018-06-0214911319715399,122.61.21431.4835

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-06-02Ondrej VainlichIntel_Core_i5_OndraN71000013845000622581.6296.9693.843%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-18Architects Cubedm1_452642650.043
2013-03-08Freaks32Manual testing2652660.085
2013-03-13SMoffatManual testing2662670.171
2013-03-14g0bManual testing2672680.341
2014-02-13mhskManual testing2682690.682
2014-02-17mhskManual testing2692701.365
2014-03-10Preben SManual testing2702712.730
2017-06-11Strolling JellyfishManual testing27127438.22
2018-05-21XyzzyManual testing27427543.68
2018-05-28TheJudgerManual testing27527687.35


ECM factoring results:
No ECM results for M87601777


Lucas-Lehmer results:
No L-L results for M87601777


PRP results:
No PRP results for M87601777


CERT results:
No CERT results for M87601777


P-1 factor-bounds graph:
B1 = 710000, B2 = 13845000 (P-1 stage 2)
B1 = 710000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00