is 2 6979001 - 1
has 2100889 decimal digits
takes 1.522 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3AAC6290C8DBF6CAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.030268.0556%40000001100000003.09076.5363%140.120970.1435%2.0880%
PrimeNet2630.228763.4921%300008000000.02273.3120%0.251464.7012%1.2091%
GPU722674.257665.6716%450009000000.02902.2394%4.286666.4404%0.7688%
Difference+5+132.7725+2.3839%+3955000+109100000+3.0618+4.2969%+135.8343+3.7031%+1.3192%

Known prime factors:
No known factors for M6979001

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-10-20T00:00:00vidmarv4_computers35000306250---0.016--0.772%
2011-12-05T20:46:00James HeinrichQ66001350002835000---0.089--2.034%
2020-01-30T10:57:21takahashivaio6000001200000012---0.386--3.585%
2021-11-24T13:25:54Seth_TrManual testing400000011000000012---3.091--6.536%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-21T00:00:00ANONYMOUSv4_computers21262--0.088--
2005-08-16T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.281--
2014-02-15T15:54:00lycornManual testing264265--0.535--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.071--
2016-04-26T14:24:12Gordon SpenceManual testing266267--2.141--
2018-02-27T00:22:03-Anonymous-Manual testing267268--4.283--
2020-04-24T07:20:53TJAOIManual testing268269--8.566--
2021-08-09T10:19:07takahashiManual testing269270--17.13--
2021-09-06T17:55:34SRBaseManual testing270271--34.26--
2021-09-26T07:30:54SRBaseManual testing271272--68.53--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computers288F9675EF5199__1.522
1999-07-12T00:00:00ANONYMOUSv4_computers3AAC6290C8DBF6CA1.522
2001-11-24T00:00:00vidmarv4_computers3AAC6290C8DBF6CA1.522


PRP results:
No PRP results for M6979001


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 = 306250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-24T13:25:54+00:00