is 2 4920263 - 1
has 1481147 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 (2 factors, 110.9 bits, 0.00225406% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4920263284856166253511444.6952894725
52 × 89 × 1301
-8913017.449e-73.116e-53.640e-5
4920263853646238381292985832066.2108674802936157
3 × 137 × 82493 × 255859
2019-08-08824932558593.59130.01850.0337

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4920263243166394802025023958267712617763334110.906
P-1 results:
No P-1 results for M4920263


Trial Factoring results:
No TF results for M4920263


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
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.210


Lucas-Lehmer results:
No L-L results for M4920263


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T18:08:21kkmrkkblmbrbkManual testing
28485616625351
F0D9621ACD2EE5__no
2018-04-14T19:42:54Oliver KruseGTX-0
28485616625351
F0D9621ACD2EE5__no
2019-08-08T22:55:37Niels_Mache_NextcloudSuperDry-X
28485616625351
85364623838129298583
9CCBB12B086E041Cno
2019-08-08T23:56:39ATHec2-PRPCFDC
28485616625351
85364623838129298583
9CCBB12B086E041Cno


P-1 factor-bounds graph:
100
101
102
103
104
105
100
101
102
103
104
105
106
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-08-08T23:56:39+00:00