is 2 20925647 - 1
has 6299248 decimal digits
takes 14.830 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-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671.420062.6866 %----1.420062.6866 %
Target2695.705363.7681 %150000225000001.40543.7820 %7.110765.1384 %
Difference-2-4.2853-1.0815 %-150000-22500000-1.4054-3.7820 %-5.6907-2.4519 %

Known prime factors (2 factors, 83.4 bits, 0.00039867% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20925647172427331291134.005412
22 × 103
2011-06-1941031.191e-109.653e-61.062e-5
209256477528954462214391549.41917989777
13 × 1383829
2011-06-191313838296.778e-60.07750.1447

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-19AxonManual testing2683.4250.9410.000%


Trial Factoring results:
57585960616263646566676869
No TF results for M20925647


ECM factoring results:
No ECM results for M20925647


Lucas-Lehmer results:
No L-L results for M20925647


PRP results:
No PRP results for M20925647


CERT results:
No CERT results for M20925647


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
TF factor-bounds graph:
this exponent TF target: 69
TF double-checked to: 67
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00