is 2 6975467 - 1
has 2099825 decimal digits
takes 1.521 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2416E96714A81659double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.099668.0556%40000001100000003.09076.5359%140.190370.1434%2.0879%
PrimeNet2630.228863.4921%280007000000.02043.1641%0.249264.6472%1.1552%
GPU722674.259865.6716%450009000000.02902.2392%4.288766.4403%0.7687%
Difference+5+132.8398+2.3839%+3955000+109100000+3.0618+4.2967%+135.9016+3.7031%+1.3192%

Known prime factors:
No known factors for M6975467

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16T00:00:00ANONYMOUSv4_computers35000341250---0.016--0.800%
2001-10-06T00:00:00ebravickv4_computers3000030000---0.009--0.234%
2011-12-07T16:04:00James HeinrichQ66001350002835000---0.089--2.034%
2020-01-29T07:54:23takahashivaio6000001200000012---0.386--3.585%
2021-11-21T22:24:50Seth_TrManual testing400000011000000012---3.091--6.536%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-09T00:00:00ANONYMOUSv4_computers21262--0.088--
2001-10-06T00:00:00ebravickv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.281--
2014-02-15T15:51:00lycornManual testing264265--0.536--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.071--
2016-04-26T14:24:10Gordon SpenceManual testing266267--2.143--
2018-02-26T00:49:29-Anonymous-Manual testing267268--4.285--
2020-04-24T07:20:54TJAOIManual testing268269--8.570--
2021-08-08T08:07:40takahashiManual testing269270--17.14--
2021-09-06T18:10:13SRBaseManual testing270271--34.28--
2021-09-25T07:18:44SRBaseManual testing271272--68.56--


ECM factoring results:
Total ECM effort:2.984 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.984


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27T00:00:00ANONYMOUSv4_computers2416E96714A816591.521


PRP results:
No PRP results for M6975467


P-1 factor-bounds graph:
B1 = 4000000, B2 = 110000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 600000, B2 = 12000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 135000, B2 = 2835000 (P-1 stage 2)
B1 = 135000 (P-1 stage 1)
B1 = 35000, B2 = 341250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-21T22:24:50+00:00