is 2 6985829 - 1
has 2102945 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-LC32796CB9B543D32double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.896268.0556%40000001100000003.09076.5369%139.986970.1437%2.0882%
PrimeNet2630.228563.4921%300008000000.02273.3125%0.251264.7014%1.2093%
GPU722674.253565.6716%450009000000.02902.2398%4.282466.4405%0.7689%
Difference+5+132.6428+2.3839%+3955000+109100000+3.0618+4.2971%+135.7045+3.7032%+1.3193%

Known prime factors:
No known factors for M6985829

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-10-06T00:00:00ANONYMOUSv4_computers35000288750---0.015--0.757%
2011-12-12T00:50:00James HeinrichQ66001350002835000---0.089--2.034%
2020-02-01T12:05:58takahashivaio6000001200000012---0.386--3.586%
2021-11-28T22:07:41Seth_TrManual testing400000011000000012---3.091--6.537%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-21T00:00:00mhoneyv4_computers21261--0.044--
1998-08-30T00:00:00ANONYMOUSv4_computers21262--0.088--
1998-09-20T00:00:00ANONYMOUSv4_computers21262--0.088--
2004-04-09T00:00:00Sturle Sundev4_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--
2018-02-25T07:27:19-Anonymous-Manual testing267268--4.279--
2020-04-10T07:57:01TJAOIManual testing268269--8.558--
2021-08-11T11:44:32takahashiManual testing269270--17.12--
2021-09-06T17:55:12SRBaseManual testing270271--34.23--
2021-09-25T07:21:21SRBaseManual 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)
1999-10-07T00:00:00ANONYMOUSv4_computersC32796CB9B543D321.523
2001-10-13T00:00:00ANONYMOUSv4_computersC32796CB9B543D321.523


PRP results:
No PRP results for M6985829


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 = 288750 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-28T22:07:41+00:00