is 2 21502651 - 1
has 6472943 decimal digits
takes 15.239 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
Actual2671.381962.6866 %----1.381962.6866 %
Target2695.552263.7681 %160000225000001.41513.8347 %6.967365.1575 %
Difference-2-4.1703-1.0815 %-160000-22500000-1.4151-3.8347 %-5.5855-2.4709 %

Known prime factors (3 factors, 111.1 bits, 0.00051655% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21502651344042417928.3588
23
2011-06-22881.666e-128.221e-61.673e-5
21502651172451261031134.005401
401
2008-09-0814011.157e-102.342e-54.188e-5
215026514596358941874791548.70710687889
10687889
2011-06-221106878892.434e-60.59841.1176

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-22AxonManual testing2477.0650.9410.000%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-08Will EdgingtonManual testing??
34.005
11


ECM factoring results:
No ECM results for M21502651


Lucas-Lehmer results:
No L-L results for M21502651


PRP results:
No PRP results for M21502651


CERT results:
No CERT results for M21502651


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
106
107
108
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