is 2 6985519 - 1
has 2102851 decimal digits
takes 1.523 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD86A8A99809FF770double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.902368.0556%2000000580000001.59705.5236%138.499369.8200%1.7645%
PrimeNet2630.228563.4921%300008000000.02273.3125%0.251264.7014%1.2093%
GPU722674.253665.6716%450009000000.02902.2398%4.282666.4405%0.7689%
Difference+5+132.6487+2.3839%+1955000+57100000+1.5681+3.2838%+134.2167+3.3795%+0.9956%

Known prime factors:
No known factors for M6985519

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-06-23T00:00:00oerwinv4_computers9000090000---0.028--0.524%
2011-06-15T05:49:00Carsten Kossendeyleela44500013572500---0.367--3.528%
2021-11-07T02:26:06Seth_TrManual testing20000005800000012---1.597--5.524%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-16T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-08-24T00:00:00ANONYMOUSv4_computers21262--0.088--
2000-02-09T00:00:00ANONYMOUSv4_computers21263--0.228--
2000-05-05T00:00:00ANONYMOUSv4_computers21263--0.228--
2014-02-09T10:18:00NesowaManual testing263264--0.281--
2014-02-14T19:26:00lycornManual testing264265--0.535--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.070--
2016-04-26T14:24:14Gordon SpenceManual testing266267--2.139--
2018-02-27T00:22:05-Anonymous-Manual testing267268--4.279--
2020-04-10T07:57:01TJAOIManual testing268269--8.558--
2021-08-11T11:44:31takahashiManual testing269270--17.12--
2021-09-16T06:37:30SRBaseManual testing270271--34.23--
2021-09-19T09:34:12Jon PaceManual testing271272--68.46--


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)
2000-03-08T00:00:00vidmarv4_computersD86A8A99809FF7701.523


PRP results:
No PRP results for M6985519


P-1 factor-bounds graph:
B1 = 2000000, B2 = 58000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 445000, B2 = 13572500 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-07T02:26:06+00:00