is 2 3387311 - 1
has 1019683 decimal digits
takes 0.356 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
Actual26817.596567.6471%33873111119079501.41638.3322%19.012870.3428%2.6957%
PrimeNet2600.045363.3333%140002800000.00432.8453%0.049764.3766%1.0433%
GPU722641.050865.6250%180003200000.00521.7908%1.056066.2406%0.6156%
Difference+4+16.5457+2.0221%+3369311+111587950+1.4110+6.5415%+17.9568+4.1022%+4.1022%

Known prime factors (2 factors, 61.5 bits, 0.00181648% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
33873116774623722.6921
1
-111.650e-131.523e-73.099e-7
33873114913565590391238.83872529
29 × 41 × 61
2008-09-0741611.837e-86.410e-61.271e-5

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
338731133287554460664672971961.530
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-03-14T12:32:21Jocelyn LaroucheManual testing33873137260426-
skipped known factor: 6774623
skipped known factor: 491356559039
--0.080--3.539%
2021-03-14T12:32:29Jocelyn LaroucheManual testing33873171133536-
skipped known factor: 6774623
skipped known factor: 491356559039
--0.108--4.077%
2021-12-28T19:52:00Jocelyn LaroucheManual testing33873113387311-
skipped known factor: 6774623
skipped known factor: 491356559039
--0.516--3.898%
2021-12-29T13:07:59Jocelyn LaroucheManual testing3387311111907950-
skipped known factor: 6774623
skipped known factor: 491356559039
--1.416--8.332%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-07T19:48:00Will EdgingtonManual testing??38.838127.55570e-90.7681.63132e-8
2021-10-24T13:13:39Jocelyn LaroucheManual testing267268--8.824--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.439 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.439 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.439


Lucas-Lehmer results:
No L-L results for M3387311


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-05T10:11:44kkmrkkblmbrbkc4.xlarge
6774623
491356559039
924E0FCA2F742D__no
2017-11-20T23:21:51Oliver KruseThreadripper
6774623
491356559039
924E0FCA2F742D__no


P-1 factor-bounds graph:
B1 = 3387311, B2 = 111907950 (P-1 stage 2)
B1 = 3387311 (P-1 stage 1)
B1 = 338731, B2 = 7113353 (P-1 stage 2)
B1 = 338731, B2 = 3726042 (P-1 stage 2)
B1 = 338731 (P-1 stage 1)
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TF factor-bounds graph:
268
2
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2100
Last modified: 2021-12-29T13:07:59+00:00