is 2 4928389 - 1
has 1483593 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
Actual2676.029165.6716%----6.029165.6716%0.0000%
PrimeNet2610.062362.2951%220004500000.00913.3053%0.071463.5413%1.2463%
GPU722651.480364.6154%340007000000.01412.4101%1.494565.4682%0.8528%
Difference+2+4.5488+1.0563%-34000-700000-0.0141-2.4101%+4.5347+0.2034%+0.2034%

Known prime factors (3 factors, 143.5 bits, 0.00291130% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4928389709688017929.40372
23 × 32
-991.474e-111.809e-63.681e-6
49283893571702076091238.37836236
22 × 9059
2008-09-08490591.370e-89.996e-50.0002
4928389613531322312856234388872375.7006224461201346487
3 × 11 × 31 × 9001 × 675982369
2019-08-1190016759823692,207.07.403913.825

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
49283892534794163695095213532167.780
49283894354158274995987945895243571707932105.102
49283892191351097651071552864426631389118335114.077
49283891555175615042762328277465605872533321705411144143.480
P-1 results:
No P-1 results for M4928389


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08T00:19:00Will EdgingtonManual testing??38.378126.26579e-91.4501.33022e-8


ECM factoring results:

Old Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020.420


Lucas-Lehmer results:
No L-L results for M4928389


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:19:43kkmrkkblmbrbkManual testing
709688017
357170207609
B2F72FA73C622C__no
2018-04-10T01:51:53ATHec2-PRPCFDC
709688017
357170207609
B2F72FA73C622C__no
2019-08-12T16:02:13Niels_Mache_NextcloudSuperDry-X
709688017
357170207609
61353132231285623438887
E178FA5A350AD162no
2019-08-14T07:25:23arnaudstm-11-010
709688017
357170207609
61353132231285623438887
E178FA5A350AD162no


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
2
220
230
240
250
260
270
280
290
2100
Last modified: 2019-08-14T07:25:23+00:00