is 2 12672131 - 1
has 3814692 decimal digits
takes 5.176 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
Actual2672.344864.1791 %40000042845985014.05019.9855 %16.394967.7560 %
Target2684.703664.7059 %90000110000000.40543.0966 %5.109065.7988 %
Difference-1-2.3588-0.5268 %+310000+417459850+13.6447+6.8889%+11.2859+1.9572 %

Known prime factors (1 factor, 30.1 bits, 0.00023743% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1267213111404917911030.08745
32 × 5
-991.140e-115.331e-61.085e-5

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-03-29nordisweet16_30.8b11400000400000
skipped known factor: 1140491791
--0.2232.158%
2022-04-24nordisweet16_30.8b14400000428459850
skipped known factor: 1140491791
--16.479.178%


Trial Factoring results:
575859606162636465666768
No TF results for M12672131


ECM factoring results:
No ECM results for M12672131


Lucas-Lehmer results:
No L-L results for M12672131


PRP results:
dateuseridcompidcofactorsres64
2022-06-29Poaooffice-CN2
1140491791
7EA406A63BEFFB49


CERT results:
dateuseridcompid
2022-07-05griswold1117


P-1 factor-bounds graph:
B1 = 400000, B2 = 428459850 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 68
TF double-checked to: 67
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00