is 2 21180737 - 1
has 6376038 decimal digits
takes 15.010 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
Actual2671.402962.6866 %----1.402962.6866 %
Target2695.636663.7681 %160000225000001.41513.8268 %7.051765.1547 %
Difference-2-4.2337-1.0815 %-160000-22500000-1.4151-3.8268 %-5.6488-2.4681 %

Known prime factors (4 factors, 149.8 bits, 0.00070716% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21180737296530319928.1447
7
2011-06-20171.691e-121.364e-62.091e-6
2118073711861212731030.14428
22 × 7
2008-09-08476.794e-124.278e-68.365e-6
2118073740568312805591341.88395767
7 × 13681
2008-09-087136812.391e-80.00080.0014
211807378592886055265291549.61020284672
28 × 17 × 59 × 79
2011-06-202562565.742e-60.00030.0005

11 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-20AxonManual testing2477.7540.9410.000%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-08Will EdgingtonManual testing??
30.144
10
2008-09-08Will EdgingtonManual testing??
41.883
13


ECM factoring results:
No ECM results for M21180737


Lucas-Lehmer results:
No L-L results for M21180737


PRP results:
No PRP results for M21180737


CERT results:
No CERT results for M21180737


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