is 2 57731249 - 1
has 17378838 decimal digits
takes 122.358 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD3C381D5440232B5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27466.270364.8649%540000110700003.42263.7191%69.692966.1716%1.3067%
PrimeNet2692.068062.3188%260000110000002.59735.5377%4.665364.4055%2.0867%
GPU7227333.133664.3836%400000130000003.33904.0749%36.472665.8349%1.4514%
Difference+1+33.1367+0.4813%+140000-1930000+0.0837-0.3559%+33.2203+0.3367%+0.3367%

Known prime factors:
No known factors for M57731249

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-09-22T01:11:00GrunwalderGIMPvangelis54000011070000---3.423--3.719%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers21253--2.07846e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers21254--4.15693e-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--
2009-01-10T11:39:00Sturle Sundevancraft.ifi263264--0.034--
2009-01-17T02:33:00Team_Deutschlandwm_hot1264265--0.065--
2009-01-17T07:57:00endless_mikeEM_XP_2500b265266--0.129--
2010-05-27T11:45:00Loïc EvannoC8CDB759B266267--0.259--
2010-05-28T21:43:00Loïc EvannoC8CDB759B267268--0.518--
2011-04-26T08:19:00Paul LeylandManual testing268269--1.036--
2011-06-18T04:41:00GrunwalderGIMPcompute-head269270--2.071--
2011-10-30T23:54:00XyzzyManual testing270271--4.142--
2012-05-04T19:28:00monstManual testing271272--8.284--
2012-08-31T22:27:00Craig MeyersManual testing272273--16.57--
2019-02-03T18:20:57TheJudgerManual testing273274--33.14--


ECM factoring results:
No ECM results for M57731249


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-12-15T20:30:00twmossserbkD3C381D5440232B5122.4
2021-06-03T18:07:55-Anonymous-D3C381D5440232B5122.4


PRP results:
No PRP results for M57731249


P-1 factor-bounds graph:
B1 = 540000, B2 = 11070000 (P-1 stage 2)
B1 = 540000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-03T18:07:55+00:00