is 2 129303679 - 1
has 38924286 decimal digits
takes 656.396 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
Actual2727.396062.5000 %13400003953000025.17896.8282 %32.575065.0606 %
Target277236.715364.9351 %80000014000000061.71263.8724 %298.428066.2929 %
Difference-5-229.3193-2.4351 %+540000-100470000-36.5337+2.9558%-265.8530-1.2324 %

Known prime factors (1 factor, 72.8 bits, 0.00005633% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12930367984289951732441498169992272.83632593794849581
7 × 37 × 4229 × 29757571
2017-07-314229297575717.396011.96322.289

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-07-31QingkongS_C61340000395300001222272.83625.184.392%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-07-30sasaki3mate242632640.015
2010-11-09Aliali-pone2642650.029
2012-10-05louqianli2652660.058
2015-02-08Richardhp-yulian2662670.116
2016-03-10proxy2222Manual testing2672680.231
2016-04-27DerekManual testing2682690.462
2016-04-27DerekManual testing2692700.925
2016-04-28DerekManual testing2702711.849
2016-04-28DerekManual testing2712723.699


ECM factoring results:
No ECM results for M129303679


Lucas-Lehmer results:
No L-L results for M129303679


PRP results:
No PRP results for M129303679


CERT results:
No CERT results for M129303679


P-1 factor-bounds graph:
B1 = 1340000, B2 = 39530000 (P-1 stage 2)
B1 = 1340000 (P-1 stage 1)
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108
TF factor-bounds graph:
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this exponent TF target: 77
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00