is 2 74230187 - 1
has 22345513 decimal digits
takes 205.224 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
Actual275103.083564.0000%635000119062505.00743.6024%108.090965.2969%1.2969%
PrimeNet2703.219061.4286%320000140000004.27075.5505%7.489763.5695%2.1409%
GPU7227451.540663.5135%500000170000005.60824.1330%57.148865.0215%1.5080%
Difference+1+51.5429+0.4865%+135000-5093750-0.6008-0.5306%+50.9421+0.2754%+0.2754%

Known prime factors (1 factor, 76.9 bits, 0.00010361% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
742301871418952798866086600720792476.909955778811971797
11 × 29 × 260189 × 11515367
2015-11-0626018911515367376.513.50134.6975

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-11-06T20:56:19Jwb52zClay635000119062502476.9095.007410.410.013.602%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-12T23:29:00lycornManual testing21264--0.048--
2010-10-27T01:49:00ANONYMOUS264265--0.050--
2010-11-19T07:21:00trifdale265266--0.101--
2010-11-26T09:31:00kurlyslice266267--0.201--
2010-11-29T02:24:00kwaifeh267268--0.403--
2010-12-05T04:42:00Sid & AndySlinky268269--0.805--
2012-10-29T03:49:00Clown_RoyalManual testing269270--1.611--
2013-05-09T01:57:00SMoffatManual testing270271--3.221--
2015-06-07T14:40:00RichD0Manual testing271272--6.443--
2015-08-31T02:29:00BdotManual testing272273--12.89--
2015-10-29T15:47:48AirSquirrelsManual testing273274--25.77--
2015-10-29T15:47:48AirSquirrelsManual testing274275--51.54--


ECM factoring results:
No ECM results for M74230187


Lucas-Lehmer results:
No L-L results for M74230187


PRP results:
No PRP results for M74230187


P-1 factor-bounds graph:
B1 = 635000, B2 = 11906250 (P-1 stage 2)
B1 = 635000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2015-11-06T20:56:19+00:00