is 2 4920241 - 1
has 1481141 decimal digits
takes 0.682 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
Actual2676.039165.6716%----6.039165.6716%0.0000%
PrimeNet2610.062462.2951%220004500000.00913.3044%0.071563.5410%1.2459%
GPU722651.482864.6154%320007000000.01372.3756%1.496565.4560%0.8406%
Difference+2+4.5563+1.0563%-32000-700000-0.0137-2.3756%+4.5426+0.2156%+0.2156%

Known prime factors (1 factor, 52.2 bits, 0.00106085% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
492024151600123639228311652.196524365815
3 × 5 × 34957721
-5349577210.00010.38280.7150

P-1 results:
No P-1 results for M4920241


Trial Factoring results:
No TF results for M4920241


ECM factoring results:

Old Calculation Method

Total ECM effort:0.630 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.630 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.630


Lucas-Lehmer results:
No L-L results for M4920241


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T18:08:21kkmrkkblmbrbkManual testing
5160012363922831
EA9A1D18145264__no
2018-04-08T09:12:30ATHec2-PRPCFDC
5160012363922831
EA9A1D18145264__no


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2019-08-08T19:10:35+00:00