is 255493563-1
has 16,705,228 decimal digits
takes 117.616 GHz-days to do one L-L test
Last-known PrimeNet details:
1 L-L tests remaining
ResidueStatus
L-LD1514673EFC077__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27334.469764.3836%1,000,00020,000,0006.25454.9023%40.724169.2859%6.9670%
PrimeNet2692.151462.3188%240,00010,000,0002.37175.3615%4.523167.6804%5.3615%
GPU7227334.469764.3836%360,00012,000,0003.05533.9345%37.525068.3181%3.9345%
Difference---+640,000+8,000,000+3.1992+0.9678%+3.1992+0.9678%+0.9678%

Known prime factors (1 factor, 137.8 bits, 0.00024831% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
5549356330277055170963696727959643123753939326636942137.7972727979024428805979529521570254368
25 × 3 × 7 × 29 × 503 × 47711 × 99787 × 152219 × 170279 × 2255191
170,2792,255,1912018-01-312.355e+90.87241.0650

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-04-11T08:34:00ANONYMOUS680,000680,000---2.090--1.883%
2018-02-01T04:28:22Sid & AndySpeck1,000,00020,000,000642137.7976.254235.212.514.902%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-15T00:00:00ANONYMOUSv4_computers?253--2.16227e-5--
2000-01-19T00:00:00ANONYMOUSv4_computers?253--2.16227e-5--
2000-03-01T00:00:00ANONYMOUSv4_computers?254--4.32455e-5--
2000-05-31T00:00:00ANONYMOUSv4_computers?256--0.000--
2001-09-30T00:00:00ANONYMOUSv4_computers?257--0.000--
2002-07-27T00:00:00ANONYMOUSv4_computers?258--0.001--
2016-02-23T16:40:21Mark RoseManual testing258263--0.028--
2009-01-13T20:47:001997rj7compw263264--0.035--
2009-01-14T11:40:00tmorrowteapot264265--0.067--
2009-01-15T11:07:00tmorrowteapot265266--0.135--
2009-01-16T14:16:00tmorrowteapot266267--0.269--
2009-05-23T00:20:00RoaldSmXP97267268--0.539--
2011-04-10T23:46:00ITSSP-Koko268269--1.077--
2011-06-09T13:57:00Chris VernieriGASFLO269270--2.155--
2012-04-05T12:35:00lycornManual testing270271--4.309--
2012-04-05T12:35:00lycornManual testing271272--8.618--
2016-01-29T21:38:33ANONYMOUSManual testing272273--17.24--


ECM factoring results:
Exponent "55493563" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-02-02T03:25:00ANONYMOUSD1514673EFC077__117.6


PRP results:
Exponent "55493563" not found


P-1 factor-bounds graph:
B1 = 1,000,000, B2 = 20,000,000 (stage 2)
B1 = 1,000,000 (stage 1)
B1 = 680,000 (stage 1)
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TF factor-bounds graph:
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258
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Last modified: 2018-02-01T04:28:22+00:00