is 2 6918179 - 1
has 2082580 decimal digits
takes 1.509 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
Actual2674.295065.6716%----4.295065.6716%
Target2674.295065.6716%4500072000000.13752.2362%4.432566.4393%
Difference----45000-7200000-0.1375-2.2362%-0.1375-0.7676%

Known prime factors (4 factors, 146.1 bits, 0.00211237% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
691817913836359823.7221
1		-111.616e-133.162e-76.435e-7
6918179142376123831133.7291029
3 × 73		2008-09-083433432.023e-100.00010.0002
6918179708974983931136.0455124
22 × 3 × 7 × 61		2008-09-087611.468e-93.143e-64.504e-6
691817970261723414806791652.642507805041
3 × 169268347		2014-08-1931692683470.00012.91595.4461

11 Composite Factors:
P-1 results:
No P-1 results for M6918179


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08Will EdgingtonManual testing??33.729113.68413e-117.3411.79282e-10
2008-09-08Will EdgingtonManual testing??36.045111.44358e-107.3417.02494e-10
2014-08-19TJAOIManual testing??52.642164.43186e-57.3410.000


ECM factoring results:
No ECM results for M6918179


Lucas-Lehmer results:
No L-L results for M6918179


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-11kkmrkkblmbrbkManual testing
13836359
14237612383
70897498393
7026172341480679
4976F50C798433__no
2019-01-24krackerfront
13836359
14237612383
70897498393
7026172341480679
4976F50C79843370no


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
2
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-06-05T21:50:05+00:00