is 2 12055457 - 1
has 3629055 decimal digits
takes 4.641 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
Actual2672.464864.1791 %4000002621272508.18379.3753 %10.648567.5374 %
Target2684.944264.7059 %80000100000000.34642.9431 %5.290665.7446 %
Difference-1-2.4795-0.5268 %+320000+252127250+7.8374+6.4321%+5.3579+1.7928 %

Known prime factors (2 factors, 135.6 bits, 0.00112510% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12055457218110221353691444.310904612
22 × 139 × 1627
1999-08-2213916273.506e-70.00010.0002
1205545731043969482184019234219082072891.326128754843064779789079
17 × 61 × 3571 × 206803 × 168127259
2022-01-0120680316812725972,022,7655.22279.551

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-12-29nordisweet16_30.8b6400000400000
skipped known factor: 21811022135369
--0.2232.142%
2022-01-01nordisweet16_30.8b640000026212725022891.32610.188.602%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-08-22ANONYMOUSv4_computers??
44.310
14


ECM factoring results:
No ECM results for M12055457


Lucas-Lehmer results:
No L-L results for M12055457


PRP results:
dateuseridcompidcofactorsres64
2022-01-07kutensterra
21811022135369
3104396948218401923421908207
F83E64E824955774


CERT results:
dateuseridcompid
2022-01-08LOBESACER


P-1 factor-bounds graph:
B1 = 400000, B2 = 262127250 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 68
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00