is 2 20505041 - 1
has 6172633 decimal digits
takes 14.532 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
Actual2671.449162.6866 %----1.449162.6866 %
Target2695.822363.7681 %150000225000001.40543.7715 %7.227765.1346 %
Difference-2-4.3732-1.0815 %-150000-22500000-1.4054-3.7715 %-5.7786-2.4480 %

Known prime factors (2 factors, 86.3 bits, 0.00042098% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20505041729569358791136.0861779
3 × 593
2011-06-1735936.184e-103.611e-56.235e-5
2050504113265644412366331650.23732347276
22 × 132 × 109 × 439
2011-06-171694391.152e-50.00020.0004

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-17AxonManual testing2686.3230.9410.000%


Trial Factoring results:
57585960616263646566676869
No TF results for M20505041


ECM factoring results:
No ECM results for M20505041


Lucas-Lehmer results:
No L-L results for M20505041


PRP results:
No PRP results for M20505041


CERT results:
No CERT results for M20505041


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