is 2 12882217 - 1
has 3877934 decimal digits
takes 5.262 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP0A7C394B55A870__
unverified PRP test

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.306664.1791%40000042845985014.050110.0023%16.356767.7620%3.5829%
PrimeNet2640.276362.5000%6000017000000.08854.3315%0.364864.1243%1.6243%
GPU722684.626964.7059%9000024000000.12783.1646%4.754865.8228%1.1169%
Difference-1-2.3203-0.5268%+310000+426059850+13.9223+6.8377%+11.6019+1.9392%+2.4660%

Known prime factors (2 factors, 168.0 bits, 0.00130430% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1288221726925894684731341.292104508
22 × 32 × 2903
-929033.686e-89.872e-50.0002
1288221714110733936851236199599347908055790693739126.7305476826673875791798725075003804
22 × 3 × 11 × 13 × 229 × 277 × 2593 × 8783 × 21529 × 60869 × 1685897
2022-05-186086916858971.381e+100.08850.1016

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1288221737994413590790192825952184719309345938779422949720
1
51168.022
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-05-12T07:58:06nordisweet16_30.8b14400000400000-
skipped known factor: 2692589468473
--0.237--2.430%
2022-05-18T09:04:41nordisweet16_30.8b1440000042845985039126.73014.0510.5228.1010.002%


Trial Factoring results:
No TF results for M12882217


ECM factoring results:
No ECM results for M12882217


Lucas-Lehmer results:
No L-L results for M12882217


PRP results:
dateuseridcompidcofactorsres64PRP
2022-05-24T06:36:22XZT600G2Mini5
2692589468473
141107339368512361995993479080557906937
0A7C394B55A870__no


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:
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Last modified: 2022-05-24T06:36:22+00:00