is 2 1339381 - 1
has 403194 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-L164036B1B6A250CCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270178.403870.0000%500000150000000.07143.6284%178.475271.0885%1.0885%
PrimeNet2560.007262.5000%60001000000.00062.6089%0.007863.4784%0.9784%
GPU722600.114765.0000%5500400000.00040.9799%0.115165.3430%0.3430%
Difference+10+178.2891+5.0000%+494500+14960000+0.0710+2.6486%+178.3601+5.7456%+5.7456%

Known prime factors (1 factor, 68.1 bits, 0.00508253% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13393813107793004175888815192168.074116016018002939
19 × 83 × 73567544707
2014-03-20837356754470763.621221.90414.45

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-07T00:00:00Jocelyn Larouchev4_computers20000300000---0.002--0.615%
2016-03-17T19:05:12alpertronManual testing5000001500000012---0.071--3.628%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-04T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-23T00:00:00ANONYMOUSv4_computers21258--0.029--
2022-03-07T17:32:35LordJuliusManual testing258260--0.086--
2009-02-20T06:52:00Sturle Sundeghirardelli.ifi260261--0.115--
2012-08-02T21:54:00lycornManual testing261264--2.428--
2013-09-04T18:45:00David CampeauManual testing264265--2.790--
2014-02-11T14:11:00Never Odd Or EvenManual testing265266--5.579--
2014-02-11T14:11:00Never Odd Or EvenManual testing266267--11.16--
2014-02-11T14:11:00Never Odd Or EvenManual testing267268--22.32--
2014-02-11T14:11:00Never Odd Or EvenManual testing268269--44.63--
2014-03-20T16:58:00Never Odd Or EvenManual testing26826968.0742119.120.10438.85
2014-02-11T14:11:00Never Odd Or EvenManual testing269270--89.27--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.168 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:25.168 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.72
250000350000005013.45


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-03-17T00:00:00Bruce A Metcalfv4_computers164036B1B6A250CC0.051


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T06:01:16Oliver KruseGTX-3
310779300417588881519
F31D446A5778C1__no
2017-10-23T06:51:29kkmrkkblmbrbkold
310779300417588881519
F31D446A5778C1__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 300000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
270
269
268
267
266
265
264
261
260
258
257
250
260
270
280
290
2100
Last modified: 2022-03-07T17:32:35+00:00