is 2 21540349 - 1
has 6484292 decimal digits
takes 15.265 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
Actual2671.379562.6866 %----1.379562.6866 %
Target2695.542563.7681 %160000225000001.41513.8356 %6.957665.1578 %
Difference-2-4.1630-1.0815 %-160000-22500000-1.4151-3.8356 %-5.5782-2.4713 %

Known prime factors (2 factors, 94.4 bits, 0.00043835% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21540349525337663200471445.5781219427
11 × 17 × 6521
2011-06-221765214.233e-70.00040.0007
215403495049298626701831548.84311720559
3 × 1201 × 3253
2011-06-22120132533.338e-60.00130.0025

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-22AxonManual testing2994.4210.9410.000%


Trial Factoring results:
57585960616263646566676869
No TF results for M21540349


ECM factoring results:
No ECM results for M21540349


Lucas-Lehmer results:
No L-L results for M21540349


PRP results:
No PRP results for M21540349


CERT results:
No CERT results for M21540349


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