is 2 1341089 - 1
has 403709 decimal digits
takes 0.051 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0D11897055C9ADBDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26722.156668.6567%500000150000000.07144.8817%22.228070.1868%1.5301%
PrimeNet2560.007262.5000%60001000000.00062.6096%0.007863.4786%0.9786%
GPU722600.114565.0000%5500400000.00040.9801%0.114965.3431%0.3431%
Difference+7+22.0420+3.6567%+494500+14960000+0.0710+3.9016%+22.1130+4.8438%+4.8438%

Known prime factors (2 factors, 130.6 bits, 0.00973910% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1341089106941602514934152312063.2133987118025535
3 × 5 × 2297 × 115719577
2015-01-1722971157195772.12650.34920.6519
13410891942586793134483071672167.39772425722421647
7 × 10346531774521
2007-12-2271034653177452138.40031,20858,288

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1341089207743344682148504737576983680436426057740130.610
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00Team Prime Ribv4_computers15000217500---0.001--0.797%
2015-01-18T12:26:00alpertronManual testing50000015000000122063.2130.0710.1020.1434.882%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-04T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-23T00:00:00ANONYMOUSv4_computers21258--0.029--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.127 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000300 / 1003.0004.904%
2550000300 / 2801.07134.186%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.127 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.64719.258%
302500000.14186.886%
3510000000.01099.022%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025011.68
250000350000005013.45


Lucas-Lehmer results:
No L-L results for M1341089


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T06:07:24Oliver KruseGTX-2
10694160251493415231
194258679313448307167
834694B9CBDECE7Eno
2017-10-05T21:29:20Oliver KruseManual testing
10694160251493415231
194258679313448307167
834694B9CBDECE__no
2017-10-24T05:36:26kkmrkkblmbrbkc4.xlarge
10694160251493415231
194258679313448307167
834694B9CBDECE__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-08-27T10:04:43+00:00