is 2 4978079 - 1
has 1498552 decimal digits
takes 0.690 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
Actual2675.969065.6716%----5.969065.6716%0.0000%
PrimeNet2610.061762.2951%220004500000.00913.3108%0.070863.5434%1.2483%
GPU722651.465664.6154%340007000000.01412.4142%1.479765.4696%0.8543%
Difference+2+4.5034+1.0563%-34000-700000-0.0141-2.4142%+4.4893+0.2020%+0.2020%

Known prime factors (2 factors, 104.5 bits, 0.00209971% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4978079248903951927.89125
52
-25253.611e-125.025e-61.023e-5
49780791172695839192601431584392476.63411778598121811661
7 × 103 × 16336474510141
2019-08-25103163364745101413,833.5178,889334,115

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
49780792918886276962991462896108609248932104.525
P-1 results:
No P-1 results for M4978079


Trial Factoring results:
No TF results for M4978079


ECM factoring results:

Old Calculation Method

Total ECM effort:0.211 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.211 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.211


Lucas-Lehmer results:
No L-L results for M4978079


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T16:59:36kkmrkkblmbrbkManual testing
248903951
40407A202E1A45__no
2018-04-21T13:51:51arnaudstm-11-010
248903951
40407A202E1A45__no
2019-08-26T17:47:17Niels_Mache_NextcloudSuperDry-X
248903951
117269583919260143158439
0DB34B1DDC29E0EEno
2019-09-03T11:43:49_p95holder_TFL16_PRPt11-E_b
248903951
117269583919260143158439
0DB34B1DDC29E0EEno


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2019-09-03T11:43:49+00:00