is 2 2567179 - 1
has 772798 decimal digits
takes 0.178 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.574567.1642%----11.574567.1642%0.0000%
PrimeNet2590.029962.7119%110002000000.00212.6886%0.032163.7144%1.0025%
GPU722630.621765.0794%120001800000.00211.4800%0.623865.5962%0.5168%
Difference+4+10.9528+2.0848%-12000-180000-0.0021-1.4800%+10.9507+1.5680%+1.5680%

Known prime factors (2 factors, 83.2 bits, 0.00324244% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
256717925671791824.6145
5
-158.716e-131.225e-72.047e-7
25671794447092577724110391858.62686614384461
3 × 11 × 2624678317
2015-09-181126246783170.018914.38226.862

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2567179114164831212984617593008492683.239
P-1 results:
No P-1 results for M2567179


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-09-18T11:39:00TJAOIManual testing258259*58.626180.0040.3610.008


ECM factoring results:

Old Calculation Method

Total ECM effort:0.277 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.277 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.277


Lucas-Lehmer results:
No L-L results for M2567179


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:28:32alpertronManual testing
25671791
444709257772411039
EDE427B6E1EFA5__no
2017-11-11T08:15:56Oliver KruseGTX-1
25671791
444709257772411039
EDE427B6E1EFA5__no


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
259
220
230
240
250
260
270
280
290
2100
Last modified: 2018-03-21T19:46:46+00:00