is 2 2743747 - 1
has 825951 decimal digits
takes 0.212 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
Actual26710.829767.1642%----10.829767.1642%0.0000%
PrimeNet2590.028062.7119%120002200000.00262.8513%0.030663.7751%1.0632%
GPU722630.581765.0794%140002400000.00291.7083%0.584665.6759%0.5965%
Difference+4+10.2480+2.0848%-14000-240000-0.0029-1.7083%+10.2450+1.4883%+1.4883%

Known prime factors (2 factors, 111.0 bits, 0.00404495% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2743747119543300791931443.4432178468
22 × 33 × 23 × 877
-278776.534e-78.210e-61.001e-5
27437472146619257353202163692167.54139118389147272
23 × 140831 × 34721039
2018-04-161408313472103912.0370.22680.3957

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2743747256613951567523240690364166491021734110.983
P-1 results:
No P-1 results for M2743747


Trial Factoring results:
No TF results for M2743747


ECM factoring results:

Old Calculation Method

Total ECM effort:0.312 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.312 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.312


Lucas-Lehmer results:
No L-L results for M2743747


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-20T10:05:20Oliver KruseGTX-1
11954330079193
22232BD27DBA34__no
2017-12-05T14:53:56kkmrkkblmbrbkc4.xlarge
11954330079193
22232BD27DBA34__no
2018-04-19T00:42:53Oliver KruseGTX-5
11954330079193
214661925735320216369
22232BD27DBA34__no


P-1 factor-bounds graph:
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2018-04-19T00:42:53+00:00