is 2 21363989 - 1
has 6431202 decimal digits
takes 15.140 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
Actual2671.390862.6866 %----1.390862.6866 %
Target2695.588263.7681 %160000225000001.41513.8313 %7.003465.1563 %
Difference-2-4.1974-1.0815 %-160000-22500000-1.4151-3.8313 %-5.6125-2.4697 %

Known prime factors (2 factors, 76.5 bits, 0.00035802% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21363989170911913927.3494
22
2011-06-21448.377e-134.110e-68.365e-6
213639896199314735665111549.13914508795
3 × 5 × 7 × 138179
2011-06-2171381795.026e-60.00770.0144

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-21AxonManual testing2476.4880.9410.000%


Trial Factoring results:
57585960616263646566676869
No TF results for M21363989


ECM factoring results:
No ECM results for M21363989


Lucas-Lehmer results:
No L-L results for M21363989


PRP results:
No PRP results for M21363989


CERT results:
No CERT results for M21363989


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
106
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