is 2 6911941 - 1
has 2080702 decimal digits
takes 1.507 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
Actual2674.298965.6716%----4.298965.6716%
Target2674.298965.6716%450009000000.02902.2359%4.327966.4392%
Difference----45000-900000-0.0290-2.2359%-0.0290-0.7675%

Known prime factors (3 factors, 156.7 bits, 0.00226712% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
69119416397850596571271549.18546281143
46281143		-1462811431.696e-50.79731.4891
691194121790899828154331650.953157632276
22 × 3 × 13136023		2014-06-124131360233.342e-50.22630.4226
69119411065949709475121611856.5657710928880
24 × 5 × 443 × 217577		2015-08-064432175770.00170.00390.0070

4 Composite Factors:
P-1 results:
No P-1 results for M6911941


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-06-12TJAOIManual testing??50.953161.17237e-57.3425.71118e-5
2015-04-14TJAOIManual testing256257*56.565180.0007.3390.002


ECM factoring results:
No ECM results for M6911941


Lucas-Lehmer results:
No L-L results for M6911941


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-09kkmrkkblmbrbkManual testing
639785059657127
2179089982815433
106594970947512161
1567041D9BE5D1__no
2019-02-23arnaudstm-11-010
639785059657127
2179089982815433
106594970947512161
1567041D9BE5D1F1no


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
257
2
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00