is 2 87181249 - 1
has 26244172 decimal digits
takes 280.796 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
Actual276175.542364.4737 %730000144175006.89203.5272 %182.434265.7268 %
Target27587.770164.0000 %55000010000000027.87333.9949 %115.643465.4382 %
Difference+1+87.7721+0.4737 %+180000-85582500-20.9813-0.4677 %+66.7909+0.2886 %

Known prime factors (1 factor, 108.4 bits, 0.00012436% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8718124943296296577486049444908646910648933108.4162483119769108036605721756
22 × 3931 × 13627 × 18119 × 620827 × 1030219
2018-05-1562082710302191.835e+93.00365.9008

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-05-15HardyP Germanyws-Xeon1630_3.7GHz73000014417500233108.4166.8923.885%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-16Architects Cubedm1_442642650.043
2013-03-04AxelssonManual testing2652660.086
2013-06-21PascalBieriManual testing2662670.171
2013-06-22PascalBieriManual testing2672680.343
2013-06-24PascalBieriManual testing2682690.686
2013-09-28SRS TechnologyManual testing2692729.60
2017-05-18Robin89Manual testing27227310.97
2017-06-12ANONYMOUSManual testing27327421.94
2018-04-01Strolling JellyfishManual testing274276131.7


ECM factoring results:
No ECM results for M87181249


Lucas-Lehmer results:
No L-L results for M87181249


PRP results:
No PRP results for M87181249


CERT results:
No CERT results for M87181249


P-1 factor-bounds graph:
B1 = 730000, B2 = 14417500 (P-1 stage 2)
B1 = 730000 (P-1 stage 1)
104
105
106
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105
106
107
108
TF factor-bounds graph:
276
274
273
272
269
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00