is 216591571-1
has 4,994,561 decimal digits
takes 9.072 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LAEB81AE7CA7B7B70double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2697.195665.2174%325,0006,500,0000.52444.4064%7.720169.6238%6.5468%
PrimeNet2650.439763.0769%70,0002,200,0000.14754.3408%0.587267.4177%4.3408%
GPU722697.195665.2174%120,0003,200,0000.22823.2839%7.423868.5013%3.2839%
Difference---+205,000+3,300,000+0.2962+1.1225%+0.2962+1.1225%+1.1225%

Known prime factors (1 factor, 121.4 bits, 0.00073180% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
16591571354780587703023660629299146528726280737121.416106915911610486933584920664393
3 × 31 × 53 × 59 × 61 × 107 × 4973 × 5483 × 316783 × 6521077
316,7836,521,0772020-03-299.172e+90.51920.5261

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-12-25T00:00:00ANONYMOUSv4_computers260,000260,000---0.206--1.649%
2020-03-30T03:23:44James Heinrichi3-8100325,0006,500,0001237121.4160.52418.141.0494.406%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-30T00:00:00Jocelyn Larouchev4_computers?259--0.002--
2002-01-28T00:00:00ANONYMOUSv4_computers?265--0.225--
2016-03-16T02:23:54Mark RoseManual testing265266--0.450--
2014-09-07T00:49:00NesowaManual testing266267--0.901--
2018-03-08T10:48:43ramgeisManual testing267268--1.802--
2018-03-08T10:48:43ramgeisManual testing268269--3.603--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50,0005,000,00010.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-08-08T00:00:00ANONYMOUSv4_computersAEB81AE7CA7B7B709.072
2006-03-14T00:00:00Pierzastyv4_computersAEB81AE7CA7B7B709.072


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-05T16:17:35CrypticCluecruncher
3547805877030236606292991465287262807
B949BDCCD9252C7Dno
2020-09-18T10:19:53JaytholomewJaytholomew
3547805877030236606292991465287262807
B949BDCCD9252C7Dno


P-1 factor-bounds graph:
B1 = 325,000, B2 = 6,500,000 (stage 2)
B1 = 325,000 (stage 1)
B1 = 260,000 (stage 1)
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107
TF factor-bounds graph:
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259
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Last modified: 2020-09-18T10:19:53+00:00