is 2 12891829 - 1
has 3880828 decimal digits
takes 5.266 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
Actual2672.304964.1791 %40000042845985014.050110.0030 %16.355067.7623 %
Target2684.623564.7059 %90000120000000.43763.1649 %5.061165.8229 %
Difference-1-2.3186-0.5268 %+310000+416459850+13.6125+6.8381%+11.2939+1.9394 %

Known prime factors (2 factors, 112.7 bits, 0.00087392% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
128918294090319505131238.57315864
23 × 3 × 661
-86614.073e-92.581e-53.981e-5
12891829201193889881357851195612374.091780315538940820
22 × 32 × 5 × 159931 × 27105979
2022-05-1915993127105979358.440.96431.6337

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-05-14nordisweet16_30.8b14400000400000
skipped known factor: 409031950513
--0.2372.163%
2022-05-19nordisweet16_30.8b1440000042845985022374.09116.479.195%


Trial Factoring results:
575859606162636465666768
No TF results for M12891829


ECM factoring results:
No ECM results for M12891829


Lucas-Lehmer results:
No L-L results for M12891829


PRP results:
dateuseridcompidcofactorsres64
2022-05-26XZT800G2Mini3
409031950513
20119388988135785119561
D72BC04C48C8B7BB


CERT results:
dateuseridcompid
2022-05-26Ruslan BorisovMB2013


P-1 factor-bounds graph:
B1 = 400000, B2 = 428459850 (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