is 2 67560391 - 1
has 20337705 decimal digits
takes 170.778 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
Actual27456.628863.5135 %----56.628863.5135 %
Target27456.628863.5135 %4500007500000016.53663.9325 %73.165464.9483 %
Difference----450000-75000000-16.5366-3.9325 %-16.5366-1.4348 %

Known prime factors (1 factor, 74.8 bits, 0.00011071% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
67560391328571423684271139263532374.799243168681250136
23 × 19 × 83 × 95461 × 201911
2014-05-259546120191185.2630.37110.7121

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-05-25tschpxw6600-32374.7992.2540.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-12-25Wojciech FlorekManual testing2632640.029
2010-01-03Sturle Sundedanzi.ifi2642650.055
2010-01-05steinrarformula2652660.111
2010-01-10arnaudSRV-1402662670.221
2010-01-16arnaudSRV-1402672680.442
2010-01-21arnaudSRV-1402682690.885
2012-02-24dslt12692701.770
2012-07-21Zet_kormeganet_i52702713.539
2014-05-06chalsallManual testing2712727.079
2014-05-11James HeinrichManual testing27227314.16
2014-05-18TheJudgerManual testing27327428.32


ECM factoring results:
No ECM results for M67560391


Lucas-Lehmer results:
No L-L results for M67560391


PRP results:
No PRP results for M67560391


CERT results:
No CERT results for M67560391


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00