is 2 4238459 - 1
has 1275904 decimal digits
takes 0.529 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
Actual2677.010565.6716%----7.010565.6716%0.0000%
PrimeNet2610.072562.2951%180003600000.00662.9186%0.079163.3955%1.1004%
GPU722651.721364.6154%240004500000.00851.9224%1.729865.2956%0.6802%
Difference+2+5.2892+1.0563%-24000-450000-0.0085-1.9224%+5.2807+0.3760%+0.3760%

Known prime factors (2 factors, 110.4 bits, 0.00260380% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4238459305082922513131444.7943598984
23 × 379 × 1187
-37911875.534e-77.650e-50.0001
4238459546382203805316509992065.5676445528950561
3 × 19 × 107 × 941 × 1123079
2018-12-3094111230792.57650.01120.0207

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4238459166691879546090580241213451551168734110.361
P-1 results:
No P-1 results for M4238459


Trial Factoring results:
No TF results for M4238459


ECM factoring results:

Old Calculation Method

Total ECM effort:0.182 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.182 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.182


Lucas-Lehmer results:
No L-L results for M4238459


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-16T12:32:39Oliver KruseGTX-3
30508292251313
CD89B6D7672E83__no
2017-12-29T00:47:14kkmrkkblmbrbkc4.xlarge
30508292251313
CD89B6D7672E83__no
2018-12-30T15:21:44Oliver KruseGTX-6
30508292251313
54638220380531650999
CD89B6D7672E83D1no


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2018-12-30T15:21:44+00:00