is 2 20746007 - 1
has 6245171 decimal digits
takes 14.702 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
Actual2671.432362.6866 %----1.432362.6866 %
Target2695.754763.7681 %150000225000001.40543.7776 %7.160165.1368 %
Difference-2-4.3224-1.0815 %-150000-22500000-1.4054-3.7776 %-5.7278-2.4502 %

Known prime factors (2 factors, 77.3 bits, 0.00037242% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20746007165968057927.3064
22
2011-06-18448.626e-134.110e-68.365e-6
2074600710923136570462791649.95626325877
172 × 71 × 1283
2011-06-1828912834.489e-60.00040.0006

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-18AxonManual testing2477.2630.9410.000%


Trial Factoring results:
57585960616263646566676869
No TF results for M20746007


ECM factoring results:
No ECM results for M20746007


Lucas-Lehmer results:
No L-L results for M20746007


PRP results:
No PRP results for M20746007


CERT results:
No CERT results for M20746007


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
TF factor-bounds graph:
this exponent TF target: 69
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00