is 2 87750779 - 1
has 26415617 decimal digits
takes 295.834 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
Actual276174.402964.4737 %715000141212507.06573.5060 %181.468765.7192 %
Target27587.200564.0000 %60000010000000029.40654.0446 %116.606965.4561 %
Difference+1+87.2025+0.4737 %+115000-85878750-22.3408-0.5386 %+64.8617+0.2632 %

Known prime factors (1 factor, 80.8 bits, 0.00009204% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8775077920595373896251134035282232580.76911735151602614909
7 × 739 × 298159 × 7608487
2018-06-1729815976084873,073.83.40453.7847

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-06-17ANONYMOUS715000141212501222580.7697.0663.863%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-19Architects Cubedm1_f22642650.043
2013-05-08c10ck3rManual testing2652660.085
2013-06-22SMoffatManual testing2662670.170
2013-12-24Carsten KossendeyManual testing2672680.341
2014-01-18Carsten KossendeyManual testing2682690.681
2014-07-24SMoffatManual testing2692701.363
2014-09-10Preben SManual testing2702712.725
2017-06-30ANONYMOUSManual testing27127438.15
2018-05-14Brian BeuningManual testing27427543.60
2018-06-02Luigi MorelliManual testing27527687.20


ECM factoring results:
No ECM results for M87750779


Lucas-Lehmer results:
No L-L results for M87750779


PRP results:
No PRP results for M87750779


CERT results:
No CERT results for M87750779


P-1 factor-bounds graph:
B1 = 715000, B2 = 14121250 (P-1 stage 2)
B1 = 715000 (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