is 2 12401489 - 1
has 3733221 decimal digits
takes 4.775 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
Actual2672.396064.1791 %4000002662432508.30899.4207 %10.704967.5537 %
Target2684.806364.7059 %90000110000000.38213.0867 %5.188365.7953 %
Difference-1-2.4103-0.5268 %+310000+255243250+7.9269+6.3340%+5.5166+1.7584 %

Known prime factors (2 factors, 76.4 bits, 0.00061636% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12401489776829270971136.1773132
22 × 33 × 29
-27291.239e-91.513e-53.068e-5
1240148913173357675371340.26153112
23 × 3 × 2213
2008-09-08822131.767e-87.153e-50.0001

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-03-09nordisweet16_30.8b10400000400000
skipped known factor: 77682927097
skipped known factor: 1317335767537
--0.2232.151%
2022-03-20nordisweet16_30.8b11400000266243250
skipped known factor: 77682927097
skipped known factor: 1317335767537
--10.348.645%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-08Will EdgingtonManual testing??
40.261
13


ECM factoring results:
No ECM results for M12401489


Lucas-Lehmer results:
No L-L results for M12401489


PRP results:
dateuseridcompidcofactorsres64
2022-05-26XZT800G2Mini3
77682927097
1317335767537
202382A322471575


CERT results:
dateuseridcompid
2022-05-26VikkiMtFVikki_s_IdeaPad


P-1 factor-bounds graph:
B1 = 400000, B2 = 266243250 (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