is 2 1374019 - 1
has 413621 decimal digits
takes 0.052 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
Actual26721.625668.6567%500000150000000.07144.8961%21.697070.1913%1.5346%
PrimeNet2560.007062.5000%60001000000.00062.6222%0.007663.4833%0.9833%
GPU722600.111865.0000%5500600000.00051.1387%0.112365.3985%0.3985%
Difference+7+21.5138+3.6567%+494500+14940000+0.0709+3.7574%+21.5847+4.7928%+4.7928%

Known prime factors (2 factors, 105.6 bits, 0.00768414% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
137401913767670391030.359501
3 × 167
-31671.154e-106.608e-79.225e-7
1374019440919916220800149488472375.22316044898804921917
32 × 7 × 254680933411459
2018-07-2092546809334114596,505.6768,1851,434,755

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
13740196070440074914390920219982065403332105.582
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:05:30alpertronManual testing5000001500000012-
skipped known factor: 1376767039
--0.071--4.896%


Trial Factoring results:
No TF results for M1374019


ECM factoring results:

Old Calculation Method

Total ECM effort:25.369 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.369 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2780.000%
25500001.35825.726%
302500000.11389.312%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
500005000030.088
50000500000025011.73
50000500000010.047
250000350000005013.51


Lucas-Lehmer results:
No L-L results for M1374019


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T11:06:54Oliver KruseGTX-2
1376767039
0DA609CDB3C81E__no
2017-10-25T17:29:25kkmrkkblmbrbkc4.xlarge
1376767039
0DA609CDB3C81E__no
2018-07-21T22:23:25Gabriel Lignelli6300
1376767039
44091991622080014948847
769B9F6A942AB8__no
2018-07-22T17:40:03BattlemaxxWork-3
1376767039
44091991622080014948847
769B9F6A942AB8__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-07-30T10:25:02+00:00