is 2 3383927 - 1
has 1018664 decimal digits
takes 0.355 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
Actual26817.614167.6471%10767841116423001.08147.5331%18.695570.0842%2.4372%
PrimeNet2600.045463.3333%140002800000.00432.8448%0.049764.3764%1.0431%
GPU722641.051865.6250%180003200000.00521.7904%1.057166.2405%0.6155%
Difference+4+16.5623+2.0221%+1058784+111322300+1.0761+5.7426%+17.6384+3.8438%+3.8438%

Known prime factors (2 factors, 136.7 bits, 0.00403935% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
338392765069792777700471652.531961453849
29 × 33153581
-29331535810.00030.27510.5138
3383927215780779535414868243730812684.1583188319067394404020
22 × 32 × 5 × 7 × 11 × 230037450749957
2018-10-16112300374507499571,157,7871,908,6653,564,856

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
338392714040810609780115771985493788829045490480742136.689
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-03-14T12:32:19Jocelyn LaroucheManual testing33839237223196---0.080--3.537%
2021-03-14T12:32:28Jocelyn LaroucheManual testing33839271062466---0.108--4.075%
2022-01-07T17:30:03Jocelyn LaroucheManual testing1076784111642300-
skipped known factor: 6506979277770047
--1.081--7.533%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2021-04-11T20:11:42Jocelyn LaroucheManual testing267268--8.833--


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 M3383927


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-05T08:44:57kkmrkkblmbrbkc4.xlarge
6506979277770047
F9D3D770DA6C51__no
2017-11-21T12:01:18Oliver KruseGTX-0
6506979277770047
F9D3D770DA6C51__no
2018-10-16T12:39:24ANONYMOUS
6506979277770047
21578077953541486824373081
F9D3D770DA6C51__no


P-1 factor-bounds graph:
B1 = 1076784, B2 = 111642300 (P-1 stage 2)
B1 = 1076784 (P-1 stage 1)
B1 = 338392, B2 = 7106246 (P-1 stage 2)
B1 = 338392, B2 = 3722319 (P-1 stage 2)
B1 = 338392 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-01-07T17:30:03+00:00