is 2 6982219 - 1
has 2101858 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-LF6AB4289B0792D6Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.967068.0556%40000001100000003.09076.5366%140.057770.1436%2.0881%
PrimeNet2630.228663.4921%300008000000.02273.3122%0.251364.7013%1.2092%
GPU722674.255765.6716%450009000000.02902.2396%4.284666.4405%0.7688%
Difference+5+132.7114+2.3839%+3955000+109100000+3.0618+4.2970%+135.7731+3.7032%+1.3193%

Known prime factors:
No known factors for M6982219

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-30T00:00:00Gerry Snyderv4_computers35000341250---0.016--0.800%
2011-12-11T02:50:00James HeinrichQ66001350002835000---0.089--2.034%
2020-01-31T07:15:11takahashivaio6000001200000012---0.386--3.585%
2021-11-26T09:32:15Seth_TrManual testing400000011000000012---3.091--6.537%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11T00:00:00ANONYMOUSv4_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--
2016-04-26T14:24:13Gordon SpenceManual testing266267--2.141--
2018-02-25T11:47:56-Anonymous-Manual testing267268--4.281--
2020-04-10T07:57:02TJAOIManual testing268269--8.562--
2021-08-11T11:44:25takahashiManual testing269270--17.12--
2021-09-06T17:56:35SRBaseManual testing270271--34.25--
2021-09-26T07:27:44SRBaseManual testing271272--68.50--


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)
1999-03-15T00:00:00ANONYMOUSv4_computers175CEA5B17ED0C__1.523
1999-06-06T00:00:00ANONYMOUSv4_computersF6AB4289B0792D6E1.523
2001-10-13T00:00:00Gerry Snyderv4_computersF6AB4289B0792D6E1.523


PRP results:
No PRP results for M6982219


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)
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TF factor-bounds graph:
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Last modified: 2021-11-26T09:32:15+00:00