is 2 67271509 - 1
has 20250743 decimal digits
takes 170.047 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27456.872063.5135%600000109500004.26603.8311%61.138064.9113%1.3978%
PrimeNet2703.552061.4286%280000130000003.56645.3215%7.118463.4812%2.0526%
GPU7227456.872063.5135%450000150000004.55493.9304%61.426964.9476%1.4341%
Difference---+150000-4050000-0.2889-0.0993%-0.2889-0.0362%-0.0362%

Known prime factors (1 factor, 86.4 bits, 0.00012840% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
672715091006597621255089704902273372786.380748160429443532852
22 × 43 × 6761 × 205487 × 3130913
2013-09-302054873130913367,6911.33741.5328

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-09-30T15:27:00Jwb52zClay600000109500002786.3804.266340.18.5323.831%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-12-13T17:16:00Wojciech FlorekManual testing263264--0.029--
2009-12-30T08:10:00arnaudARNAUD264265--0.056--
2009-12-31T02:42:00arnaudARNAUD265266--0.111--
2010-05-04T04:19:00wavelet3000elixir2266267--0.222--
2010-05-06T06:20:00unconnectedsau07267268--0.444--
2010-05-09T01:02:00unconnectedsau07268269--0.889--
2012-05-22T16:17:00sikafarmi_rendering_farmManual testing269270--1.777--
2013-09-04T08:45:00AxelssonManual testing270271--3.555--
2013-09-04T08:45:00AxelssonManual testing271272--7.109--
2013-09-04T08:45:00AxelssonManual testing272273--14.22--
2013-09-04T17:01:00AxelssonManual testing273274--28.44--


ECM factoring results:
No ECM results for M67271509


Lucas-Lehmer results:
No L-L results for M67271509


PRP results:
No PRP results for M67271509


P-1 factor-bounds graph:
B1 = 600000, B2 = 10950000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2013-09-30T15:27:42+00:00