is 2 68845081 - 1
has 20724435 decimal digits
takes 184.065 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
Actual27455.572163.5135 %630000130725005.07044.0059 %60.642564.9751 %
Target27455.572163.5135 %4500007500000017.49063.9417 %73.062764.9517 %
Difference---+180000-61927500-12.4202+0.0641%-12.4202+0.0234 %

Known prime factors (1 factor, 83.8 bits, 0.00012168% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
68845081165231555936897957018040332683.773120002441377691136
29 × 3 × 112 × 29 × 101 × 239 × 922351
2015-01-1051292235147,1530.19670.3639

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-01-10NesowaOutback630000130725001222683.7735.0704.006%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-05-20Jossv4_computers212560.000
2004-03-26mdrgv4_computers212610.002
2009-01-061997rj7Manual testing212640.029
2010-01-21angelbm2642650.054
2010-01-27Martin Bernhardtcabrio2652660.109
2010-08-06GeneticflowBASE_ONE2662670.217
2011-02-25eon_blue_apocalypsecon-cloud0-cn02672680.434
2011-03-01eon_blue_apocalypsecon-cloud0-cn02682690.868
2012-08-01GrunwalderGIMPcompute-0-52692701.737
2013-05-06MilldangoptiplexGx2702702713.473
2014-04-21ChuckManual testing27127320.84
2014-07-06TheJudgerManual testing27327427.79


ECM factoring results:
No ECM results for M68845081


Lucas-Lehmer results:
No L-L results for M68845081


PRP results:
No PRP results for M68845081


CERT results:
No CERT results for M68845081


P-1 factor-bounds graph:
B1 = 630000, B2 = 13072500 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
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108
TF factor-bounds graph:
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256
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00