is 2 4323721 - 1
has 1301570 decimal digits
takes 0.539 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.872365.6716%----6.872365.6716%0.0000%
PrimeNet2610.071062.2951%180003600000.00662.9286%0.077763.3993%1.1042%
GPU722651.687464.6154%240005000000.00901.9837%1.696465.3173%0.7019%
Difference+2+5.1849+1.0563%-24000-500000-0.0090-1.9837%+5.1759+0.3543%+0.3543%

Known prime factors (1 factor, 43.6 bits, 0.00100907% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4323721136083065265611443.6301573680
24 × 3 × 5 × 79 × 83
-79834.400e-71.433e-52.908e-5

P-1 results:
No P-1 results for M4323721


Trial Factoring results:
No TF results for M4323721


ECM factoring results:

Old Calculation Method

Total ECM effort:0.549 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.549 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.549


Lucas-Lehmer results:
No L-L results for M4323721


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:14:31kkmrkkblmbrbkManual testing
13608306526561
D38827A6D95BBD__no
2018-02-01T00:06:39Oliver KruseGTX-5
13608306526561
D38827A6D95BBD__no


P-1 factor-bounds graph:
100
101
102
100
101
102
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-01-08T14:15:13+00:00