is 2 11966777 - 1
has 3602359 decimal digits
takes 4.607 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-LAA8B55A6A166FC19double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27139.950566.1972%61891071856732108.91418.3535%48.864569.0209%2.8237%
PrimeNet2640.297462.5000%5500015000000.07474.1121%0.372164.0420%1.5420%
GPU722684.980964.7059%8000020000000.10312.9399%5.083965.7435%1.0376%
Difference+3+34.9696+1.4913%+6109107+183673210+8.8110+5.4136%+43.7806+3.2774%+3.2774%

Known prime factors (1 factor, 83.8 bits, 0.00070011% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
11966777166195640256989672873649112683.781694404350716110415
5 × 17 × 23 × 1901 × 186845892313
2021-08-071901186845892313182,6545,682.910,614

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-05-11T00:00:00For Researchv4_computers700001155000---0.072--1.733%
2015-10-20T21:52:20Sid & AndyWoody13000022750006---0.138--2.337%
2021-06-05T06:02:50Dylan DelgadoManual testing9000002700000012---1.296--5.164%
2021-07-12T15:31:28LaurVManual testing3161897107127521---4.927--7.321%
2021-07-30T07:09:34LaurVManual testing6189107185673210---8.914--8.353%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-08-07T22:11:43LaurVZero818500000030000000027P+12683.78113.04


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-02-16T00:00:00ANONYMOUSv4_computers?264--0.164--
2013-10-06T19:59:00lycornManual testing264265--0.312--
2013-10-20T06:16:00NesowaManual testing265266--0.624--
2016-03-08T06:15:20YxinityManual testing266267--1.249--
2018-01-14T22:57:44ramgeisManual testing267268--2.498--
2018-01-14T22:57:44ramgeisManual testing268269--4.996--
2021-05-21T06:39:57lycornManual testing269270--9.99--
2021-08-15T17:00:14SRBaseManual testing270271--19.98--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.06593.752%
25500000.00699.419%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.171


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-02-25T00:00:00ANONYMOUSv4_computersAA8B55A6A166FC194.607
2004-05-25T00:00:00Team Prime Ribv4_computersAA8B55A6A166FC194.607


PRP results:
Exponent "11966777" not found


P-1 factor-bounds graph:
B1 = 5000000, B2 = 300000000 (P+1 stage 2)
B1 = 6189107, B2 = 185673210 (P-1 stage 2)
B1 = 3161897, B2 = 107127521 (P-1 stage 2)
B1 = 6189107 (P-1 stage 1)
B1 = 5000000 (P+1 stage 1)
B1 = 3161897 (P-1 stage 1)
B1 = 900000, B2 = 27000000 (P-1 stage 2)
B1 = 900000 (P-1 stage 1)
B1 = 130000, B2 = 2275000 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 70000, B2 = 1155000 (P-1 stage 2)
B1 = 70000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-08-15T17:00:14+00:00