is 2 11916161 - 1
has 3587122 decimal digits
takes 4.588 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7AA1EBC45B4E0988double-checked
PRPC92E042C62CF96C8PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27020.052765.7143%61891071856732108.91419.0073%28.966768.8025%3.0882%
PrimeNet2640.298762.5000%5500015000000.07474.1096%0.373464.0411%1.5411%
GPU722685.002064.7059%8000020000000.10312.9380%5.105165.7428%1.0369%
Difference+2+15.0506+1.0084%+6109107+183673210+8.8110+6.0693%+23.8617+3.0597%+2.0513%

Known prime factors (1 factor, 152.7 bits, 0.00128110% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
11916161901131235709204049887785476422976003432262675346152.659378113066661823405158668750960555166816
25 × 3 × 23 × 101 × 157 × 15889 × 1493981 × 1986293 × 4068667 × 56294309
2021-07-174068667562943091.494e+103.85984.6226

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-05-06T00:00:00ANONYMOUSv4_computers175000175000---0.098--1.130%
2014-11-23T11:36:00ThaManual testing3000006000000---0.341--3.711%
2021-07-17T09:44:35LaurVManual testing618910718567321046152.6598.9149.17517.839.007%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-12-14T02:02:46riccardo ubertiColab_noGPU1522500004500000027--3.184
2021-12-19T01:29:45riccardo ubertiColab_noGPU1522500004500000065--3.184


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-03-01T00:00:00bezaharv4_computers21264--0.299--
2013-10-12T00:38:00lycornManual testing264265--0.314--
2013-10-20T06:14:00NesowaManual testing265266--0.627--
2016-03-03T09:33:22ramgeisManual testing266267--1.254--
2018-01-03T13:14:27ramgeisManual testing267268--2.508--
2018-01-03T13:14:27ramgeisManual testing268269--5.017--
2021-05-16T21:51:44lycornManual testing269270--10.03--


ECM factoring results:
Total ECM effort:12.502 GHz-days
Estimated T-Level:2.885
DigitsB1CompleteFacMiss
20110000.57756.162%
25500000.05594.608%
302500000.00499.643%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.171
50000144000001011.33


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-09-30T00:00:00ANONYMOUSv4_computers7AA1EBC45B4E09884.588
2004-05-11T00:00:00Team Prime Ribv4_computers7AA1EBC45B4E09884.588


PRP results:
dateuseridcompidcofactorsres64PRP
2021-12-01T20:29:13riccardo ubertiNomad2C
9011312357092040498877854764229760034322626753
C92E042C62CF96C8no


P-1 factor-bounds graph:
B1 = 6189107, B2 = 185673210 (P-1 stage 2)
B1 = 6189107 (P-1 stage 1)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-19T01:29:45+00:00