is 2 12948961 - 1
has 3898026 decimal digits
takes 5.289 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
Actual2672.294764.1791 %40000032134830010.59379.6782 %12.888467.6459 %
Target2684.603164.7059 %90000120000000.43763.1670 %5.040765.8236 %
Difference-1-2.3084-0.5268 %+310000+309348300+10.1561+6.5111%+7.8477+1.8223 %

Known prime factors (3 factors, 203.0 bits, 0.00156757% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12948961621550129929.21124
23 × 3
-885.552e-124.738e-69.643e-6
12948961298747453798620801996172374.6611153557624424928
25 × 89 × 4391 × 92243521
2022-05-23439192243521464.812.97915.5595
129489616848992201339870497720497563513099.11226446107148441757210175
3 × 52 × 72 × 17 × 1033 × 1277 × 31223 × 10277551
2022-05-2331223102775511.476e+100.34910.6194

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-05-20nordisweet16_30.8b14400000400000
skipped known factor: 621550129
--0.2372.165%
2022-05-23nordisweet16_30.8b14400000321348300253173.77312.428.888%


Trial Factoring results:
575859606162636465666768
No TF results for M12948961


ECM factoring results:
No ECM results for M12948961


Lucas-Lehmer results:
No L-L results for M12948961


PRP results:
dateuseridcompidcofactorsres64
2022-05-29Poaooffice-CN2
621550129
29874745379862080199617
684899220133987049772049756351
72641DB131B36A97


CERT results:
dateuseridcompid
2022-05-29qtdszwsceph_10.1.13.102


P-1 factor-bounds graph:
B1 = 400000, B2 = 321348300 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
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109
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