is 271515747-1
has 21,528,386 decimal digits
takes 191.205 GHz-days to do one L-L test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27453.496863.5135%660,00013,365,0005.24214.0646%58.739067.5781%6.1495%
PrimeNet2703.341261.4286%300,00014,000,0004.05675.4809%7.397966.9095%5.4809%
GPU7227453.496863.5135%500,00016,000,0005.21224.0670%58.709067.5805%4.0670%
Difference---+160,000-2,635,000+0.0299-0.0025%+0.0299-0.0025%-0.0025%

Known prime factors (1 factor, 121.9 bits, 0.00017044% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
71515747493359438977087389881022807918699636737121.89234493063393233338517810826189
112 × 17 × 2677 × 12799 × 181717 × 219041 × 12295667
219,04112,295,6672015-03-082.605e+93.39994.8505

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-03-08T13:59:00TheJudgerManual testing660,00013,365,000637121.8925.242382.410.484.065%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-10-19T10:34:00Wojciech FlorekManual testing?264--0.027--
2010-06-22T01:15:00{WC}PistolPeteA8V-X-P264265--0.052--
2010-06-25T12:33:00Gymnasium_RaublingLZ2265266--0.104--
2010-06-29T06:26:00Gymnasium_RaublingLZ2266267--0.209--
2010-08-29T06:05:00Gnorfe_resq1267268--0.418--
2010-08-29T16:30:00Gnorfe_resq1268269--0.836--
2012-12-12T14:26:00ANONYMOUS269270--1.672--
2013-07-23T04:56:00natha(net)Manual testing270271--3.344--
2013-07-23T04:56:00natha(net)Manual testing271272--6.687--
2015-02-09T19:27:00BdotManual testing272273--13.37--
2015-02-20T19:47:00chalsallManual testing273274--26.75--


ECM factoring results:
Exponent "71515747" not found


Lucas-Lehmer results:
Exponent "71515747" not found


PRP results:
Exponent "71515747" not found


P-1 factor-bounds graph:
B1 = 660,000, B2 = 13,365,000 (stage 2)
B1 = 660,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2015-03-08T13:59:00+00:00