is 2 74682809 - 1
has 22481766 decimal digits
takes 206.475 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-LF53487F9C012EB__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275102.458864.0000%655000131000005.34393.6906%107.802765.3286%1.3286%
PrimeNet2703.199561.4286%320000140000004.27075.5546%7.470263.5710%2.1425%
GPU7227451.228263.5135%500000170000005.60824.1361%56.836465.0226%1.5091%
Difference+1+51.2306+0.4865%+155000-3900000-0.2643-0.4455%+50.9663+0.3060%+0.3060%

Known prime factors:
No known factors for M74682809

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-12-06T17:03:42TheJudgerManual testing6550001310000012---5.344--3.691%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-04-20T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2016-04-02T20:40:24Mark RoseManual testing257264--0.047--
2010-09-15T15:54:00SpielauerC73E6CCF6264265--0.050--
2010-09-16T14:26:00JMGarciasede_vacante265266--0.100--
2010-09-20T19:16:00Hrudey4098Office_1266267--0.200--
2010-09-23T13:07:00eon_blue_apocalypse4core_7years267268--0.400--
2010-09-26T16:20:00eon_blue_apocalypse4core_7years268269--0.800--
2012-11-03T16:12:00NBBlackBird269270--1.601--
2013-08-28T12:30:00willmoreManual testing270271--3.202--
2015-08-26T07:37:00FredrikManual testing271272--6.404--
2015-11-23T21:25:35AirSquirrelsManual testing272273--12.81--
2015-11-23T21:25:35AirSquirrelsManual testing273274--25.62--
2015-11-23T21:25:35AirSquirrelsManual testing274275--51.23--


ECM factoring results:
No ECM results for M74682809


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-20T09:40:27AirSquirrelsManual testingF53487F9C012EB__206.5


PRP results:
No PRP results for M74682809


P-1 factor-bounds graph:
B1 = 655000, B2 = 13100000 (P-1 stage 2)
B1 = 655000 (P-1 stage 1)
104
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105
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108
TF factor-bounds graph:
275
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2100
Last modified: 2016-06-20T09:40:27+00:00