is 2 2947999 - 1
has 887437 decimal digits
takes 0.251 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3334DA7A5A602F39double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.079467.1642%1000000200000000.25126.0731%10.330569.1583%1.9942%
PrimeNet2590.026062.7119%130002600000.00333.0733%0.029363.8578%1.1460%
GPU722630.541465.0794%170003000000.00401.9474%0.545465.7594%0.6800%
Difference+4+9.5380+2.0848%+983000+19700000+0.2472+4.1258%+9.7851+3.3989%+3.3989%

Known prime factors (1 factor, 77.3 bits, 0.00262210% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
29479991859619339716612645630172477.29931540365850134492
22 × 32 × 13 × 67393944124219
2016-01-01136739394412421916,882453,142846,343

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.305%
2010-11-04T05:05:00markrtiny950001971250---0.024--2.758%
2014-11-06T23:05:00Jocelyn LaroucheManual testing116772116772---0.014--1.066%
2015-04-30T21:53:00VictordeHollanderManual testing100000020000000---0.251--6.073%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:25Mark RoseManual testing21260--0.052--
2009-02-13T21:45:00Sturle Sundebach.ifi260261--0.052--
2011-07-16T12:28:00Rob_Deetwopc261262--0.104--
2013-01-07T13:49:00dbaughManual testing262263--0.333--
2015-04-27T09:54:00VictordeHollanderManual testing263264--0.666--
2015-04-27T09:54:00VictordeHollanderManual testing264265--1.267--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.274 GHz-days
Estimated T-Level:0.550
DigitsB1CurvesCompleteFacMiss
201100011 / 1000.11089.534%
255000011 / 2800.03996.141%

New Calculation Method

Total ECM effort:1.274 GHz-days
Estimated T-Level:0.550
DigitsB1CompleteFacMiss
20110000.35570.129%
25500000.03296.844%
302500000.00299.803%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.042
50000500000020.232


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-22T00:00:00ANONYMOUSv4_computers3334DA7A5A602F390.251


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:32:47alpertronManual testing
185961933971661264563017
32105DCC840415__no
2017-11-18T09:59:55Oliver KruseGTX-2
185961933971661264563017
32105DCC840415__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 95000, B2 = 1971250 (P-1 stage 2)
B1 = 116772 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2017-11-18T09:59:55+00:00