is 2 57731461 - 1
has 17378902 decimal digits
takes 122.359 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L286FDE53661570FEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27466.270064.8649%52000088400002.99113.5319%69.261266.1058%1.2409%
PrimeNet2692.068062.3188%260000110000002.59735.5377%4.665364.4055%2.0867%
GPU7227333.133564.3836%400000130000003.33904.0749%36.472565.8349%1.4514%
Difference+1+33.1365+0.4813%+120000-4160000-0.3478-0.5430%+32.7887+0.2709%+0.2709%

Known prime factors:
No known factors for M57731461

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-10-08T06:09:00Ilya AlexandrovVTest_PC5200008840000---2.991--3.532%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers21253--2.07846e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers21254--4.15691e-5--
2000-06-29T00:00:00ANONYMOUSv4_computers21256--0.000--
2000-07-03T00:00:00ANONYMOUSv4_computers21256--0.000--
2001-09-30T00:00:00ANONYMOUSv4_computers21257--0.000--
2002-12-02T00:00:00ANONYMOUSv4_computers21258--0.001--
2003-09-21T00:00:00Team Prime Ribv4_computers21260--0.003--
2016-02-23T17:05:27Mark RoseManual testing260263--0.025--
2009-01-10T12:04:00Sturle Sundevancraft.ifi263264--0.034--
2009-01-12T02:33:00alan145Bear4264265--0.065--
2009-01-14T12:40:00stevecodyiMac265266--0.129--
2009-01-16T08:26:00stevecodyiMac266267--0.259--
2009-05-29T14:34:00Harri Järvics-pallomeri267268--0.518--
2011-04-26T08:19:00Paul LeylandManual testing268269--1.036--
2011-06-24T22:09:00korvacbd3k269270--2.071--
2011-09-28T00:51:00XyzzyManual testing270271--4.142--
2012-05-10T19:24:00BdotManual testing271272--8.284--
2012-08-31T18:51:00Craig MeyersManual testing272273--16.57--
2014-11-17T06:06:00srow7Manual testing273274--33.14--


ECM factoring results:
No ECM results for M57731461


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-06-28T12:59:00Sid & AndyMrs_Potato_Head286FDE53661570FE122.4
2020-09-24T19:25:53Amy PondHTPC286FDE53661570FE122.4


PRP results:
No PRP results for M57731461


P-1 factor-bounds graph:
B1 = 520000, B2 = 8840000 (P-1 stage 2)
B1 = 520000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-09-24T19:25:53+00:00