is 2 68988583 - 1
has 20767633 decimal digits
takes 184.449 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L916F48551FD2AC__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275110.915664.0000%630000126000004.97063.6081%115.886265.2989%1.2989%
PrimeNet2703.463661.4286%300000130000003.84555.3856%7.309163.5059%2.0773%
GPU7227455.456563.5135%450000150000004.81773.9428%60.274264.9521%1.4386%
Difference+1+55.4591+0.4865%+180000-2400000+0.1529-0.3346%+55.6119+0.3468%+0.3468%

Known prime factors:
No known factors for M68988583

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-12-08T16:00:00FilenSirrah363000012600000---4.971--3.608%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-05-13T00:00:00Jocelyn Larouchev4_computers21256--0.000--
2004-06-04T00:00:00mdrgv4_computers21261--0.004--
2009-02-16T01:11:001997rj7Manual testing21264--0.052--
2010-01-28T02:01:00elpablo1973Jabba264265--0.054--
2010-06-07T10:49:00sannerud.comJimEmcLap265266--0.108--
2010-06-07T12:42:00sannerud.comJimEmcLap266267--0.217--
2010-06-07T14:25:00sannerud.comJimEmcLap267268--0.433--
2010-06-07T17:45:00sannerud.comJimEmcLap268269--0.867--
2012-03-14T01:39:00ANONYMOUS269270--1.733--
2012-09-28T05:33:00Bold_SeekerManual testing270271--3.466--
2013-11-21T06:42:00Kyle AskineManual testing271272--6.932--
2013-11-21T10:45:00Kyle AskineManual testing272273--13.86--
2013-11-27T22:40:00Jerry HallettManual testing273274--27.73--
2019-12-11T13:26:57Architects CubedManual testing274275--55.46--


ECM factoring results:
No ECM results for M68988583


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-11-15T04:52:00PerducciMain916F48551FD2AC__184.4


PRP results:
No PRP results for M68988583


P-1 factor-bounds graph:
B1 = 630000, B2 = 12600000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-12-11T13:26:57+00:00