is 2 12707507 - 1
has 3825341 decimal digits
takes 5.191 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-
PRP1723865E8E79D9D1verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.338364.1791%40000042845985014.05019.9883%16.388467.7570%3.5779%
PrimeNet2640.280162.5000%5500017000000.08574.2602%0.365864.0976%1.5976%
GPU722684.690564.7059%9000022000000.12143.0979%4.811965.7992%1.0934%
Difference-1-2.3522-0.5268%+310000+426259850+13.9287+6.8905%+11.5765+1.9578%+1.9578%

Known prime factors (2 factors, 98.5 bits, 0.00077543% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
127075071931541064011237.4917600
24 × 52 × 19
-25252.370e-91.481e-53.014e-5
1270750723814679319499854811961.04793703191820
22 × 5 × 7 × 17 × 39371089
2016-03-2917393710890.02781.27052.3729

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
127075074599903103184369230074791638813098.538
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-05-02T00:21:37nordisweet16_30.8b14400000400000-
skipped known factor: 193154106401
--0.237--2.425%
2022-05-02T06:24:41nordisweet16_30.8b14400000428459850-
skipped known factor: 193154106401
skipped known factor: 2381467931949985481
--14.05--9.988%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-03-29T11:14:17TJAOIManual testing261262*61.047190.00410.800.008


ECM factoring results:
No ECM results for M12707507


Lucas-Lehmer results:
No L-L results for M12707507


PRP results:
dateuseridcompidcofactorsres64PRP
2022-05-03T18:26:38Poaooffice-CN2
193154106401
2381467931949985481
1723865E8E79D9D1no


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: 2022-05-03T18:26:38+00:00