is 2 75909121 - 1
has 22850923 decimal digits
takes 209.866 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-LB4F26F666222EE__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275100.803564.0000%630000126000005.13993.6512%105.943565.3144%1.3144%
PrimeNet2703.147961.4286%320000140000004.27075.5655%7.418563.5753%2.1467%
GPU7227450.400663.5135%500000180000005.82664.1892%56.227265.0420%1.5285%
Difference+1+50.4029+0.4865%+130000-5400000-0.6867-0.5380%+49.7163+0.2724%+0.2724%

Known prime factors:
No known factors for M75909121

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T16:52:29Brian Beuningc6100a3630000126000006---5.140--3.651%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2004-09-16T00:00:00Marzbugv4_computers21263--0.021--
2009-06-01T04:13:00Architects Cubedm1_31263264--0.026--
2010-08-18T12:06:00GIMP Philippineskaliwa264265--0.049--
2010-08-21T04:10:00seekuaX3-710265266--0.098--
2010-08-23T17:20:00MerckosC2Duo266267--0.197--
2010-08-30T13:52:00paulieBorg000267268--0.394--
2010-09-04T17:50:00Per Jessenlouiswu5268269--0.788--
2010-09-10T08:34:00Per Jessenlouiswu5269270--1.575--
2012-12-17T20:47:00Oscar GDrome270271--3.150--
2015-10-30T23:25:03blipManual testing271272--6.300--
2016-03-10T09:55:07Brian BeuningManual testing272273--12.60--
2016-03-10T09:55:07Brian BeuningManual testing273274--25.20--
2016-03-10T09:55:07Brian BeuningManual testing274275--50.40--


ECM factoring results:
No ECM results for M75909121


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-08-11T12:10:16alan145Bear1B4F26F666222EE__209.9


PRP results:
No PRP results for M75909121


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:
275
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2100
Last modified: 2016-08-11T12:10:16+00:00