is 2 67271483 - 1
has 20250735 decimal digits
takes 170.047 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L0C14844FDFFF76__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275113.746764.0000%610000123525004.58073.5677%118.327465.2844%1.2844%
PrimeNet2703.552061.4286%280000130000003.56645.3215%7.118463.4812%2.0526%
GPU7227456.872063.5135%450000150000004.55493.9304%61.427064.9476%1.4341%
Difference+1+56.8747+0.4865%+160000-2647500+0.0258-0.3627%+56.9005+0.3368%+0.3368%

Known prime factors:
No known factors for M67271483

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2014-10-10T13:29:00yphysicsManual testing61000012352500---4.581--3.568%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-12-13T17:16:00Wojciech FlorekManual testing263264--0.029--
2009-12-29T20:03:00ANONYMOUSRobs264265--0.056--
2009-12-30T14:19:00GrunwalderGIMPvangelis265266--0.111--
2010-01-02T18:11:00Per Jessenlouiswu7266267--0.222--
2010-01-08T05:05:00TDH-DXLnorthstar267268--0.444--
2010-01-27T21:11:00Michael SpettelC616D7B73268269--0.889--
2012-02-22T19:56:00eon_blue_apocalypse16core269270--1.777--
2012-07-18T19:46:00gregorjanice1270271--3.555--
2014-04-27T15:43:00TheJudgerManual testing271272--7.109--
2014-04-27T15:43:00TheJudgerManual testing272273--14.22--
2014-05-04T14:48:00TheJudgerManual testing273274--28.44--
2020-10-21T04:04:02Mark RoseManual testing274275--56.87--


ECM factoring results:
No ECM results for M67271483


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-10-10T13:29:00yphysicsManual testing0C14844FDFFF76__170.0


PRP results:
No PRP results for M67271483


P-1 factor-bounds graph:
B1 = 610000, B2 = 12352500 (P-1 stage 2)
B1 = 610000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-10-21T04:04:02+00:00