is 2 17256781 - 1
has 5194809 decimal digits
takes 9.827 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.721962.6866%----1.721962.6866%0.0000%
PrimeNet2650.422861.5385%8000024000000.17044.5397%0.593263.2845%1.7460%
GPU722696.918363.7681%12000032000000.23763.3024%7.155964.9646%1.1965%
Difference-2-5.1964-1.0815%-120000-3200000-0.2376-3.3024%-5.4340-2.2781%-1.1965%

Known prime factors (2 factors, 82.8 bits, 0.00048008% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1725678174204158311032.789215
5 × 43
-5433.470e-115.838e-68.402e-6
1725678111723592970467131650.05833968076
22 × 3 × 293 × 9661
2014-05-1929396611.215e-50.00070.0008

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1725678186993934874254606917135032582.847
P-1 results:
No P-1 results for M17256781


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-05-19T13:42:00TJAOIManual testing??50.058163.45410e-620.457.18767e-6


ECM factoring results:
No ECM results for M17256781


Lucas-Lehmer results:
No L-L results for M17256781


PRP results:
No PRP results for M17256781


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2014-05-19T13:42:15+00:00