is 2 2918393 - 1
has 878524 decimal digits
takes 0.225 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
Actual26710.181667.1642%----10.181667.1642%0.0000%
PrimeNet2590.026362.7119%130002600000.00303.0678%0.029363.8558%1.1439%
GPU722630.546965.0794%170003000000.00361.9437%0.550565.7581%0.6788%
Difference+4+9.6347+2.0848%-17000-300000-0.0036-1.9437%+9.6311+1.4061%+1.4061%

Known prime factors (3 factors, 174.6 bits, 0.00598238% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
291839354220751637796491652.268928948768
25 × 11 × 997 × 2647
-99726470.00020.00010.0002
29183931343891785757505771856.89923024517016
23 × 137 × 21007771
2015-07-21137210077710.00560.12820.2394
2918393494447068754233069692065.4228471221469388
22 × 32 × 113 × 2082404491
2018-05-2711320824044914.156012.70623.731

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
291839372866822743632530632202441260747333109.167
291839326809291712959756409865661680207388136117.690
2918393664483354190690513872641758864987111337122.322
291839336028786915023387836999754943887729611521749782379
337
53174.589
P-1 results:
No P-1 results for M2918393


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-05-08T11:37:00TJAOIManual testing256257*56.899180.0020.4780.005


ECM factoring results:

Old Calculation Method

Total ECM effort:0.315 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.315 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.315


Lucas-Lehmer results:
No L-L results for M2918393


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-24T23:41:01Oliver KruseGTX-2
5422075163779649
134389178575750577
3FAB967B324503__no
2017-12-08T23:47:23kkmrkkblmbrbkc4.xlarge
5422075163779649
134389178575750577
3FAB967B324503__no
2018-05-29T21:52:07Oliver KruseGTX-7
5422075163779649
134389178575750577
49444706875423306969
3FAB967B324503__no


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
257
250
260
270
280
290
2100
Last modified: 2018-05-29T21:52:07+00:00