is 2 55282489 - 1
has 16641688 decimal digits
takes 117.168 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L356E1C04B1CB045Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27469.205764.8649%550000118250003.57813.7578%72.783866.1852%1.3203%
PrimeNet2692.159662.3188%240000100000002.37175.3590%4.531364.3382%2.0193%
GPU7227334.601364.3836%360000120000003.05533.9326%37.656665.7842%1.4007%
Difference+1+34.6045+0.4813%+190000-175000+0.5228-0.1748%+35.1273+0.4009%+0.4009%

Known prime factors:
No known factors for M55282489

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-07-09T06:55:00Jerry HallettTF255000011825000---3.578--3.758%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-15T00:00:00ANONYMOUSv4_computers21253--2.17053e-5--
2000-01-12T00:00:00ANONYMOUSv4_computers21253--2.17053e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers21254--4.34106e-5--
2000-05-31T00:00:00ANONYMOUSv4_computers21256--0.000--
2001-09-16T00:00:00ANONYMOUSv4_computers21257--0.000--
2002-07-14T00:00:00ANONYMOUSv4_computers21258--0.001--
2008-10-27T00:26:001997rj7Manual testing21264--0.064--
2009-01-01T20:50:00LuftyI7264265--0.068--
2009-09-09T22:32:00riccardo ubertiAthlonCrunch265266--0.135--
2009-09-10T21:51:00unconnectedsaudi-E5405266267--0.270--
2009-09-13T07:56:00tmorrowteapot267268--0.541--
2011-04-09T11:03:00tmorrowpaperclip268269--1.081--
2011-06-17T18:57:00shaugeManual testing269270--2.163--
2011-06-17T18:57:00shaugeManual testing270271--4.326--
2012-07-02T22:41:00bcp19Manual testing271272--8.651--
2016-01-22T19:42:11ANONYMOUSManual testing272273--17.30--
2019-03-31T09:55:37Luigi MorelliManual testing273274--34.60--


ECM factoring results:
No ECM results for M55282489


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-04-08T04:33:00Amazon EC2356E1C04B1CB045F117.2
2020-05-22T19:20:07MichaParis356E1C04B1CB045F117.2


PRP results:
No PRP results for M55282489


P-1 factor-bounds graph:
B1 = 550000, B2 = 11825000 (P-1 stage 2)
B1 = 550000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-05-22T19:20:07+00:00