is 2 12564169 - 1
has 3782192 decimal digits
takes 4.837 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
Actual2672.365064.1791%40000042845985013.24279.9768%15.607767.7529%
Target2684.744064.7059%90000110000000.38213.0927%5.126165.7974%
Difference-1-2.3791-0.5268%+310000+417459850+12.8607+6.8841%+10.4816+1.9555%

Known prime factors (1 factor, 35.0 bits, 0.00027890% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12564169353555715671135.0411407
3 × 7 × 67
-7674.753e-105.733e-67.953e-6

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-15nordisweet16_30.8b14400000400000-
skipped known factor: 35355571567
--0.223--2.421%
2022-04-17nordisweet16_30.8b14400000428459850-
skipped known factor: 35355571567
--13.24--9.977%


Trial Factoring results:
No TF results for M12564169


ECM factoring results:
No ECM results for M12564169


Lucas-Lehmer results:
No L-L results for M12564169


PRP results:
dateuseridcompidcofactorsres64PRP
2022-04-19XZT600G2Mini1
35355571567
D820321E2F4E424Ano


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: 67.9
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Last modified: 2023-10-02T12:12:48+00:00