is 2 67503959 - 1
has 20320717 decimal digits
takes 170.635 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
Actual27328.336863.0137 %----28.336863.0137 %
Target27456.676263.5135 %4500007500000016.53663.9321 %73.212864.9482 %
Difference-1-28.3394-0.4998 %-450000-75000000-16.5366-3.9321 %-44.8760-1.9345 %

Known prime factors (1 factor, 76.8 bits, 0.00011375% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
675039591299770510881554421489512476.783962736504744525
3 × 52 × 7 × 19 × 25603 × 3769673
2014-05-07256033769673334.920.84151.4060

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-05-07brissetosAlienware2476.7834.6460.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-12-18Wojciech FlorekManual testing2632640.029
2009-04-03ANONYMOUS_2642650.055
2009-04-04ckprimeGonzales2652660.111
2009-04-10BroadoakMathsClub1broadoakmathsclub2662670.221
2010-03-03ANONYMOUS2672680.443
2010-03-07ANONYMOUS2682690.886
2012-02-21Helmut KirrmaierSunX4170M22932692701.771
2012-11-03Juergen KampmeierManual testing2702713.542
2014-05-02The MawnManual testing27127321.25


ECM factoring results:
No ECM results for M67503959


Lucas-Lehmer results:
No L-L results for M67503959


PRP results:
No PRP results for M67503959


CERT results:
No CERT results for M67503959


P-1 factor-bounds graph:
103
104
105
103
104
105
106
107
TF factor-bounds graph:
273
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