is 2 57885161 - 1
has 17425170 decimal digits
takes 122.684 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
Verified Mersenne Prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27333.045564.3836%7100007100002.18201.9284%35.227565.0704%0.6868%
PrimeNet2692.062562.3188%260000110000002.59735.5395%4.659864.4062%2.0874%
GPU7227333.045564.3836%400000130000003.33904.0763%36.384565.8354%1.4518%
Difference---+310000-12290000-1.1570-2.1479%-1.1570-0.7650%-0.7650%

Known prime factors:
None — M57885161 is prime!

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-24T18:17:00ANONYMOUS710000710000---2.182--1.928%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers21253--2.07294e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers21254--4.14587e-5--
2000-06-23T00:00:00ANONYMOUSv4_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--
2007-07-04T00:00:00abcv4_computers21263--0.028--
2008-10-21T09:05:00ANONYMOUSbps25263264--0.034--
2009-03-11T22:57:00Sturle Sundegooch.ifi264265--0.065--
2009-11-28T11:21:00Wolfgang Stegerff-beogate265266--0.129--
2009-11-28T18:31:00Ungelovendettt266267--0.258--
2009-11-30T16:22:00Ungelovendettt267268--0.516--
2011-05-07T16:38:00UngelovendeManual testing268269--1.033--
2011-05-07T16:38:00UngelovendeManual testing269270--2.066--
2011-05-07T16:38:00UngelovendeManual testing270271--4.131--
2011-12-20T19:18:00Tom DuellManual testing271272--8.262--
2012-10-07T12:27:00Jerry HallettManual testing272273--16.52--


ECM factoring results:
No ECM results for M57885161


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-01-25T23:30:00curtiscwd-210--22l0000000000000000122.7


PRP results:
No PRP results for M57885161


P-1 factor-bounds graph:
B1 = 710000 (P-1 stage 1)
104
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104
105
106
TF factor-bounds graph:
273
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Last modified: 2013-01-25T23:30:00+00:00