is 2 4927387 - 1
has 1483292 decimal digits
takes 0.683 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
Actual2676.030465.6716%----6.030465.6716%0.0000%
PrimeNet2610.062362.2951%220004500000.00913.3052%0.071463.5413%1.2462%
GPU722651.480664.6154%340007000000.01412.4101%1.494865.4682%0.8528%
Difference+2+4.5497+1.0563%-34000-700000-0.0141-2.4101%+4.5356+0.2035%+0.2035%

Known prime factors (2 factors, 120.3 bits, 0.00244142% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49273876645947241176411549.23967438860
22 × 3 × 5 × 73 × 89 × 173
-891731.759e-51.881e-53.640e-5
492738724590242590382614839992271.059249526195023677
11 × 13 × 17 × 20599 × 4982933
2019-08-11205994982933181.840.05850.1019

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4927387163425454903411996925566594051512635937120.298
P-1 results:
No P-1 results for M4927387


Trial Factoring results:
No TF results for M4927387


ECM factoring results:

Old Calculation Method

Total ECM effort:0.210 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.210 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.210


Lucas-Lehmer results:
No L-L results for M4927387


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T17:04:19kkmrkkblmbrbkManual testing
664594724117641
7228228605AFD3__no
2018-04-09T20:53:28ATHec2-PRPCFDC
664594724117641
7228228605AFD3__no
2019-08-12T09:41:24Niels_Mache_NextcloudSuperDry-X
664594724117641
2459024259038261483999
1D2B20D8333FCC9Bno
2019-08-12T22:06:46marssystemssystem11
664594724117641
2459024259038261483999
1D2B20D8333FCC9Bno


P-1 factor-bounds graph:
100
101
102
103
104
105
100
101
102
103
104
105
106
107
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-08-12T22:06:46+00:00