is 2 21936017 - 1
has 6603400 decimal digits
takes 15.995 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
Actual2671.354662.6866 %----1.354662.6866 %
Target2695.442563.7681 %160000250000001.60013.9288 %7.042665.1916 %
Difference-2-4.0879-1.0815 %-160000-25000000-1.6001-3.9288 %-5.6880-2.5050 %

Known prime factors (2 factors, 90.7 bits, 0.00041332% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2193601724604752828231341.16256083
17 × 3299
2011-06-241732991.521e-80.00020.0004
219360177986315465724071549.50518203659
4099 × 4441
2011-06-24409944414.054e-60.00440.0088

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-24AxonManual testing2890.6670.9410.000%


Trial Factoring results:
57585960616263646566676869
No TF results for M21936017


ECM factoring results:
No ECM results for M21936017


Lucas-Lehmer results:
No L-L results for M21936017


PRP results:
No PRP results for M21936017


CERT results:
No CERT results for M21936017


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