is 2 6981133 - 1
has 2101531 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-L5143AA3F6A27BE7Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.988368.0556%445000136837500.36883.5337%137.357169.1844%1.1288%
PrimeNet2630.228663.4921%300008000000.02273.3121%0.251464.7012%1.2092%
GPU722674.256365.6716%450009000000.02902.2395%4.285366.4404%0.7688%
Difference+5+132.7320+2.3839%+400000+12783750+0.3398+1.2942%+133.0718+2.7440%+0.3600%

Known prime factors:
No known factors for M6981133

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-22T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.235%
2011-09-08T05:04:00Carsten Kossendeymother44500013683750---0.369--3.534%
2021-12-06T03:53:19Seth_TrManual testing20000002000000---0.632--2.397%


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--
2014-02-14T13:44:00lycornManual testing264265--0.535--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.070--
2016-04-26T14:24:12Gordon SpenceManual testing266267--2.141--
2018-02-27T00:22:04-Anonymous-Manual testing267268--4.282--
2020-04-10T07:57:03TJAOIManual testing268269--8.563--
2021-08-11T11:44:22takahashiManual testing269270--17.13--
2021-09-06T17:56:52SRBaseManual testing270271--34.25--
2021-09-25T07:02:39SRBaseManual testing271272--68.51--


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)
1999-04-13T00:00:00ANONYMOUSv4_computers5143AA3F6A27BE7E1.522
2001-10-13T00:00:00ANONYMOUSv4_computers5143AA3F6A27BE7E1.522


PRP results:
No PRP results for M6981133


P-1 factor-bounds graph:
B1 = 2000000 (P-1 stage 1)
B1 = 445000, B2 = 13683750 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-06T03:53:19+00:00