is 2 102071261 - 1
has 30726512 decimal digits
takes 406.407 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
Actual276149.934464.4737 %10000003000000014.89524.3056 %164.829666.0033 %
Target276149.934464.4737 %65000011000000038.14833.8500 %188.082765.8415 %
Difference---+350000-80000000-23.2531+0.4556%-23.2531+0.1619 %

Known prime factors (1 factor, 76.2 bits, 0.00007463% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
102071261854286180286616710114312376.177418475372948815
5 × 7 × 13 × 192 × 109 × 23373557
2021-01-0636123373557278.297.354013.732

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-01-06KrieselManual testing10000003000000022376.17714.984.306%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-05-021997rj7Manual testing2632640.019
2010-08-17Torchwood InstituteHTPC-V642642650.037
2012-04-20sasaki3home32652660.073
2013-09-07processinfoManual testing2662670.146
2013-12-18Per Jessenbluewood2672680.293
2014-04-09kutensalgol2682690.586
2014-04-27PhilManual testing2692728.200
2020-03-27Dylan DelgadoGPU72_TF2722739.371
2020-03-30SRBaseManual testing27327418.74
2020-10-10TheJudgerManual testing274276112.5


ECM factoring results:
No ECM results for M102071261


Lucas-Lehmer results:
No L-L results for M102071261


PRP results:
No PRP results for M102071261


CERT results:
No CERT results for M102071261


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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108
TF factor-bounds graph:
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264
this exponent TF target: 76
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00