is 2 21914933 - 1
has 6597053 decimal digits
takes 15.980 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
Actual2671.355962.6866 %----1.355962.6866 %
Target2695.447763.7681 %160000250000001.60013.9282 %7.047865.1914 %
Difference-2-4.0919-1.0815 %-160000-25000000-1.6001-3.9282 %-5.6919-2.5048 %

Known prime factors (3 factors, 138.7 bits, 0.00063268% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2191493324106426311031.16755
5 × 11
2011-06-245111.321e-115.632e-61.076e-5
219149331525516018076411547.1163480540
22 × 3 × 5 × 7 × 8287
2011-06-24782871.167e-60.00050.0009
2191493314889456808602564491960.36933971029728
25 × 3 × 353864893
2016-02-02323538648930.012220.38438.072

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-06-24AxonManual testing2478.2830.9410.000%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-02TJAOIManual testing260261*
60.369
19
0.003


ECM factoring results:
No ECM results for M21914933


Lucas-Lehmer results:
No L-L results for M21914933


PRP results:
No PRP results for M21914933


CERT results:
No CERT results for M21914933


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
109
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