is 2 67128277 - 1
has 20207625 decimal digits
takes 169.685 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
Actual27456.993463.5135 %----56.993463.5135 %
Target27456.993463.5135 %4500007500000016.53663.9293 %73.530064.9472 %
Difference----450000-75000000-16.5366-3.9293 %-16.5366-1.4337 %

Known prime factors (1 factor, 78.9 bits, 0.00011758% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
671282775753861174488429162753032478.9294285720885170663
34 × 1637 × 18133 × 1782463
2014-06-261813317824631,279.70.41880.6648

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-06-26lindedG88143RBXYL-TNE2478.9294.7100.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-12-11Wojciech FlorekManual testing2632640.029
2010-05-05Anonymous4502642650.056
2010-05-10Anonymous4502652660.111
2010-05-13Torchwood InstituteQ6600v22662670.223
2010-05-14ANONYMOUS2672680.445
2010-05-23ANONYMOUS2682690.891
2012-05-25PVasilev2692701.781
2013-06-30SMoffatManual testing2702713.562
2014-04-11RichD0Manual testing2712727.125
2014-04-17brilongManual testing27227314.25
2014-04-22RichD0Manual testing27327428.50


ECM factoring results:
No ECM results for M67128277


Lucas-Lehmer results:
No L-L results for M67128277


PRP results:
No PRP results for M67128277


CERT results:
No CERT results for M67128277


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