is 2 74476267 - 1
has 22419591 decimal digits
takes 205.904 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-LD129FC16362AAC__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275102.742964.0000%645000129000005.26233.6708%108.005265.3215%1.3215%
PrimeNet2703.208461.4286%320000140000004.27075.5527%7.479163.5703%2.1418%
GPU7227451.370363.5135%500000170000005.60824.1347%56.978565.0221%1.5086%
Difference+1+51.3726+0.4865%+145000-4100000-0.3459-0.4639%+51.0268+0.2994%+0.2994%

Known prime factors:
No known factors for M74476267

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-12-29T04:04:53David HruskaDesktopIIc6450001290000012---5.262--3.671%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-03-31T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2008-09-12T23:47:00lycornManual testing21264--0.048--
2010-07-07T18:11:00DigiK-ozMain264265--0.050--
2010-09-08T13:32:00ryszard1221Julita265266--0.100--
2010-09-15T13:53:00Pi_RhoStrongbad266267--0.201--
2010-09-20T22:15:00Helmut Zuluspcl1267268--0.401--
2010-09-23T14:41:00eon_blue_apocalypse4core_7years268269--0.803--
2012-10-20T08:38:00lindedG88143RBXYL-TNE269270--1.605--
2013-05-12T00:14:00S00030vd03270271--3.211--
2015-08-20T23:45:00ChuckManual testing271272--6.422--
2015-10-16T01:35:39Matthias WurtingerManual testing272273--12.84--
2015-12-15T15:02:18AirSquirrelsManual testing273274--25.69--
2015-12-15T15:02:18AirSquirrelsManual testing274275--51.37--


ECM factoring results:
No ECM results for M74476267


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-03-07T17:21:09Nick ThorperanmaD129FC16362AAC__205.9


PRP results:
No PRP results for M74476267


P-1 factor-bounds graph:
B1 = 645000, B2 = 12900000 (P-1 stage 2)
B1 = 645000 (P-1 stage 1)
104
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104
105
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107
108
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
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264
257
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2100
Last modified: 2016-03-07T17:21:09+00:00