is 2 68732567 - 1
has 20690565 decimal digits
takes 183.764 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L7709E514794B3B__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275111.328764.0000%670000147400005.56923.7517%116.897965.3506%1.3506%
PrimeNet2703.476561.4286%300000130000003.84555.3831%7.322063.5049%2.0764%
GPU7227455.663163.5135%450000150000004.81773.9409%60.480864.9514%1.4379%
Difference+1+55.6656+0.4865%+220000-260000+0.7515-0.1892%+56.4171+0.3992%+0.3992%

Known prime factors:
No known factors for M68732567

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2014-10-19T15:21:00TheJudgerManual testing67000014740000---5.569--3.752%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2004-03-08T00:00:00mdrgv4_computers21260--0.002--
2004-07-26T00:00:00mdrgv4_computers21261--0.004--
2008-10-27T00:25:001997rj7Manual testing21264--0.052--
2010-01-20T21:51:00GrunwalderGIMPcompute-0-10264265--0.054--
2010-01-26T09:52:00RomanyukRomanyuk-PC265266--0.109--
2010-01-28T13:19:00bzmsimon266267--0.217--
2010-04-06T08:17:00S00030vd10267268--0.435--
2010-04-07T18:33:00driveByUpgradesJohn_2268269--0.870--
2012-03-13T12:41:00dsls4269270--1.740--
2012-08-05T13:27:00SMoffatManual testing270271--3.479--
2014-08-13T14:54:00RichD0Manual testing271272--6.958--
2014-10-16T04:28:00BdotManual testing272273--13.92--
2014-10-22T22:29:00Mark RoseManual testing273274--27.83--
2016-03-19T00:32:30owftheevilManual testing274275--55.67--


ECM factoring results:
No ECM results for M68732567


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-07-25T18:56:36tmeekinswork27709E514794B3B__183.8


PRP results:
No PRP results for M68732567


P-1 factor-bounds graph:
B1 = 670000, B2 = 14740000 (P-1 stage 2)
B1 = 670000 (P-1 stage 1)
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108
TF factor-bounds graph:
275
274
273
272
271
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267
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265
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2100
Last modified: 2016-07-25T18:56:36+00:00