is 2 67271599 - 1
has 20250770 decimal digits
takes 170.048 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L775AF4AF8E1588__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275113.746564.0000%605000117975004.45263.5304%118.199165.2709%1.2709%
PrimeNet2703.552061.4286%280000130000003.56645.3215%7.118463.4812%2.0526%
GPU7227456.871963.5135%450000150000004.55493.9304%61.426964.9476%1.4341%
Difference+1+56.8746+0.4865%+155000-3202500-0.1024-0.4000%+56.7722+0.3234%+0.3234%

Known prime factors:
No known factors for M67271599

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-10-02T15:47:00NesowaMC60500011797500---4.453--3.530%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-12-13T17:16:00Wojciech FlorekManual testing263264--0.029--
2009-12-29T20:49:00ANONYMOUSRobs264265--0.056--
2010-02-28T07:58:00ANONYMOUS265266--0.111--
2010-03-01T06:09:00VasiliyServer266267--0.222--
2010-07-06T00:45:00GrunwalderGIMPcompute-0-7267268--0.444--
2010-07-07T03:44:00ANONYMOUS_268269--0.889--
2012-05-22T16:17:00sikafarmi_rendering_farmManual testing269270--1.777--
2013-09-04T17:01:00AxelssonManual testing270271--3.555--
2013-09-04T17:01:00AxelssonManual testing271272--7.109--
2013-09-04T23:40:00AxelssonManual testing272273--14.22--
2013-09-04T23:40:00AxelssonManual testing273274--28.44--
2015-06-21T13:11:00XyzzyManual testing274275--56.87--


ECM factoring results:
No ECM results for M67271599


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-02-27T18:38:20Bernard van der HelmLinux775AF4AF8E1588__170.0


PRP results:
No PRP results for M67271599


P-1 factor-bounds graph:
B1 = 605000, B2 = 11797500 (P-1 stage 2)
B1 = 605000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2016-02-27T18:38:20+00:00