is 2 81309131 - 1
has 24476488 decimal digits
takes 253.724 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
Actual2670.365459.7015%----0.365459.7015%0.0000%
PrimeNet2715.879861.9718%340000160000005.39895.2572%11.278663.9710%1.9992%
GPU7227594.108864.0000%550000180000006.79033.8825%100.899265.3977%1.3977%
Difference-8-93.7434-4.2985%-550000-18000000-6.7903-3.8825%-100.5337-5.6962%-5.6962%

Known prime factors (2 factors, 73.9 bits, 0.00009093% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
81309131253684488731134.562156
22 × 3 × 13
2007-08-124132.910e-112.032e-53.683e-5
813091317104791866791239.3704369
17 × 257
2007-08-12172571.753e-90.00010.0002

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
81309131180237549225968341627672373.932
P-1 results:
No P-1 results for M81309131


Trial Factoring results:
No TF results for M81309131


ECM factoring results:
No ECM results for M81309131


Lucas-Lehmer results:
No L-L results for M81309131


PRP results:
No PRP results for M81309131


P-1 factor-bounds graph:
100
101
102
100
101
102
103
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2007-08-12T03:30:26+00:00