is 2 335426887 - 1
has 100973555 decimal digits
takes 4,989.475 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
Actual278182.503362.8205 %12000000120000000385.73856.4541 %568.241865.2201 %
Target2811,460.029964.1975 %2000000400000000510.83734.0606 %1,970.867265.6513 %
Difference-3-1,277.5267-1.3770 %+10000000-280000000-125.0988+2.3935%-1,402.6254-0.4312 %

Known prime factors (1 factor, 97.6 bits, 0.00002909% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3354268872346180536454253587950143327673097.566349730541495657381209
19 × 71 × 2927 × 739957 × 119699519
2019-09-3073995711969951995,684,557155.75262.72

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-09-30Roland ClarksonManual testing1200000012000000023097.566447.35.099%


Trial Factoring results:
57585960616263646566676869707172737475767778798081
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-04-21Architects CubedManual testing2642650.011
2013-07-19LaurVManual testing2652660.022
2015-05-29Jacques MOLNEManual testing2662690.312
2016-04-01Jacques MOLNEManual testing2692700.356
2016-04-01Jacques MOLNEManual testing2702710.713
2016-04-01Jacques MOLNEManual testing2712721.426
2019-05-07Roland ClarksonPD-PC22722732.852
2019-05-14Roland ClarksonPD-PC22732745.703
2019-05-14Roland ClarksonPD-PC227427511.41
2019-05-14Roland ClarksonPD-PC227527622.81
2019-05-15Roland ClarksonPD-PC227627745.63
2019-05-16Roland ClarksonPD-PC227727891.25


ECM factoring results:
No ECM results for M335426887


Lucas-Lehmer results:
No L-L results for M335426887


PRP results:
No PRP results for M335426887


CERT results:
No CERT results for M335426887


P-1 factor-bounds graph:
B1 = 12000000, B2 = 120000000 (P-1 stage 2)
B1 = 12000000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 81
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00