is 2 74476733 - 1
has 22419731 decimal digits
takes 205.906 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
Actual275102.742364.0000%635000119062505.00743.6039%107.749665.2974%1.2974%
PrimeNet2703.208461.4286%320000140000004.27075.5527%7.479163.5703%2.1418%
GPU7227451.369963.5135%500000170000005.60824.1347%56.978165.0221%1.5086%
Difference+1+51.3723+0.4865%+135000-5093750-0.6008-0.5308%+50.7715+0.2753%+0.2753%

Known prime factors (1 factor, 78.2 bits, 0.00010494% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
744767333366054922624379115829672478.1552259803019705751
13 × 29 × 157 × 48871 × 781229
2015-12-1748871781229955.570.35590.3987

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-12-17T22:45:20Jwb52zClay635000119062502478.1555.007411.810.013.604%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-03-31T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2008-09-12T23:47:00lycornManual testing21264--0.048--
2010-09-11T06:06:00ConadComputerdual_zotac264265--0.050--
2010-09-12T14:44:00XorsistPC1265266--0.100--
2010-09-13T12:01:00GrunwalderGIMPcompute-0-2266267--0.201--
2010-09-23T09:40:00MarekBk119267268--0.401--
2010-09-28T13:05:00ITSTV268269--0.803--
2013-05-12T19:40:00S00030vd13269270--1.605--
2013-12-23T05:12:00Smok_bmvManual testing270271--3.211--
2013-12-23T05:12:00Smok_bmvManual 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 M74476733


Lucas-Lehmer results:
No L-L results for M74476733


PRP results:
No PRP results for M74476733


P-1 factor-bounds graph:
B1 = 635000, B2 = 11906250 (P-1 stage 2)
B1 = 635000 (P-1 stage 1)
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108
TF factor-bounds graph:
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2100
Last modified: 2015-12-17T22:45:20+00:00