is 2 4918513 - 1
has 1480620 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
Actual2676.041265.6716%----6.041265.6716%0.0000%
PrimeNet2610.062562.2951%220004500000.00913.3042%0.071663.5409%1.2458%
GPU722651.483364.6154%320007000000.01372.3755%1.497165.4559%0.8406%
Difference+2+4.5579+1.0563%-32000-700000-0.0137-2.3755%+4.5442+0.2157%+0.2157%

Known prime factors (2 factors, 99.2 bits, 0.00201631% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
491851378696209826.2308
23
-881.821e-121.608e-63.272e-6
491851390773761331636341776712272.943922776470567795
5 × 107 × 2371 × 727463447
2019-08-072371727463447304.517.966414.878

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
49185137143550893470571864455401492393099.173
P-1 results:
No P-1 results for M4918513


Trial Factoring results:
No TF results for M4918513


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
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.630


Lucas-Lehmer results:
No L-L results for M4918513


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T18:08:12kkmrkkblmbrbkManual testing
78696209
D926D9C16CD196__no
2018-04-07T23:44:54ATHec2-PRPCFDC
78696209
D926D9C16CD196__no
2019-08-08T02:21:35Niels_Mache_NextcloudSuperDry-X
78696209
9077376133163634177671
0F6E7622B31A790Fno
2019-08-09T04:25:49marssystemsSYSTEM01
78696209
9077376133163634177671
0F6E7622B31A790Fno


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2019-08-09T04:25:49+00:00