is 2 160279631 - 1
has 48248977 decimal digits
takes 1,051.835 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
Actual279763.872464.5570 %5000000150000000122.75165.4306 %886.624066.4817 %
Target278381.935764.1026 %1000000180000000102.31593.8992 %484.251665.5023 %
Difference+1+381.9368+0.4544 %+4000000-30000000+20.4356+1.5313%+402.3724+0.9794 %

Known prime factors (1 factor, 81.4 bits, 0.00005079% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16027963131871744698247729241635772581.3999942543696724548
22 × 3 × 7 × 13 × 29 × 5867 × 53513183
2020-11-265867535131833,055.527.79651.817

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-11-26Roland ClarksonManual testing500000015000000022581.399127.35.890%


Trial Factoring results:
5758596061626364656667686970717273747576777879
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-29Torchwood InstituteGMS-E72002632640.012
2011-02-02runeskubuntutest12642650.023
2013-02-22sasaki3mac2652660.047
2015-05-02tsculr2662670.093
2016-03-02XZTManual testing2672680.186
2017-03-21Xolotlthunder-gpu-162682690.373
2017-12-07workerthreadManual testing2692700.746
2017-12-16workerthreadManual testing2702711.492
2017-12-21workerthreadManual testing2712722.984
2017-12-29workerthreadManual testing2722735.968
2020-11-24Roland ClarksonManual testing27327411.94
2020-11-24Roland ClarksonManual testing27427523.87
2020-11-24Roland ClarksonManual testing27527647.74
2020-11-24Roland ClarksonManual testing27627795.48
2020-11-24Roland ClarksonManual testing277278191.0
2020-11-24Roland ClarksonManual testing278279381.9


ECM factoring results:
No ECM results for M160279631


Lucas-Lehmer results:
No L-L results for M160279631


PRP results:
No PRP results for M160279631


CERT results:
No CERT results for M160279631


P-1 factor-bounds graph:
B1 = 5000000, B2 = 150000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 78
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00