is 2 12784951 - 1
has 3848654 decimal digits
takes 5.222 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-
PRPDBD36ECC30CD7305PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.324164.1791%40000042845985014.05019.9945%16.374267.7592%3.5801%
PrimeNet2640.278462.5000%5500017000000.08574.2640%0.364164.0990%1.5990%
GPU722684.662164.7059%9000024000000.12783.1611%4.790065.8216%1.1157%
Difference-1-2.3380-0.5268%+310000+426059850+13.9223+6.8335%+11.5843+1.9377%+2.4645%

Known prime factors (2 factors, 161.0 bits, 0.00125959% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12784951174898129691134.026684
22 × 32 × 19
-9192.055e-105.653e-61.085e-5
1278495117163377377099640684725789629011980464739127.0136712336002343552464427039895973
3 × 7 × 83 × 139 × 523 × 1049 × 1877 × 2963 × 66683 × 136167439
2022-05-10666831361674391.125e+104.43148.2068

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
12784951300184260241838499252957155662259434587884706694349161.038
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-05-09T11:37:00nordisweet16_30.8b14400000400000-
skipped known factor: 17489812969
--0.237--2.428%
2022-05-10T01:24:04nordisweet16_30.8b1440000042845985039127.01314.0510.4428.109.995%


Trial Factoring results:
No TF results for M12784951


ECM factoring results:
No ECM results for M12784951


Lucas-Lehmer results:
No L-L results for M12784951


PRP results:
dateuseridcompidcofactorsres64PRP
2022-05-08T16:49:56XZT7040Micro2
17489812969
DBD36ECC30CD7305no
2022-05-15T22:46:43XZT800G3Mini2
17489812969
171633773770996406847257896290119804647
DBD36ECC30CD7305no


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: 2022-05-15T22:46:43+00:00