is 2 21308983 - 1
has 6414644 decimal digits
takes 15.101 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
Actual2671.394462.6866 %----1.394462.6866 %
Target2695.602763.7681 %160000225000001.41513.8300 %7.017865.1558 %
Difference-2-4.2082-1.0815 %-160000-22500000-1.4151-3.8300 %-5.6234-2.4692 %

Known prime factors (3 factors, 109.1 bits, 0.00051212% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21308983213089831927.6675
5
2011-06-21158.400e-131.252e-62.091e-6
2130898368614925271032.676161
7 × 23
2008-09-087232.779e-118.089e-61.464e-5
213089834852130862899831548.78611385177
3 × 3795059
2011-06-21337950592.330e-60.21250.3968

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-21AxonManual testing2476.4520.9410.000%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-08Will EdgingtonManual testing??
32.676
10


ECM factoring results:
No ECM results for M21308983


Lucas-Lehmer results:
No L-L results for M21308983


PRP results:
No PRP results for M21308983


CERT results:
No CERT results for M21308983


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
106
107
TF factor-bounds graph:
this exponent TF target: 69
TF double-checked to: 67
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00