is 2 56960207 - 1
has 17146731 decimal digits
takes 120.724 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7263E172682F0635double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27467.167364.8649%610000141825004.14723.9626%71.314566.2571%1.3923%
PrimeNet2692.096062.3188%240000110000002.53925.4719%4.635164.3807%2.0619%
GPU7227333.582164.3836%400000130000003.33904.0681%36.921165.8325%1.4489%
Difference+1+33.5852+0.4813%+210000+1182500+0.8082-0.1055%+34.3934+0.4247%+0.4247%

Known prime factors:
No known factors for M56960207

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-03-24T19:45:00S485122Q67-P61000014182500---4.147--3.963%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers21253--2.10660e-5--
2000-01-19T00:00:00ANONYMOUSv4_computers21253--2.10660e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers21254--4.21320e-5--
2000-06-28T00:00:00ANONYMOUSv4_computers21256--0.000--
2000-06-29T00:00:00ANONYMOUSv4_computers21256--0.000--
2001-09-30T00:00:00ANONYMOUSv4_computers21257--0.000--
2002-11-16T00:00:00ANONYMOUSv4_computers21258--0.001--
2005-01-20T00:00:00ThomRuleyv4_computers21262--0.011--
2016-02-23T16:40:43Mark RoseManual testing262263--0.017--
2008-08-27T23:50:00Sturle Sundeeberlin.ifi263264--0.034--
2008-08-30T04:30:00Sturle Sundewotan.ifi264265--0.066--
2008-09-01T05:49:00Sturle Sundewotan.ifi265266--0.131--
2008-09-02T03:55:00Sturle Sundeiago.ifi266267--0.262--
2009-11-23T01:28:00steinrardfi267268--0.525--
2011-06-11T07:28:00GrunwalderGIMPcompute-0-4268269--1.050--
2011-10-22T15:10:00NBBlackBird269270--2.099--
2011-11-03T22:45:00hellridergrManual testing270271--4.198--
2012-06-18T09:18:00Patrik JohanssonManual testing271272--8.396--
2016-01-05T22:53:55LaurVManual testing272273--16.79--
2019-02-03T18:25:50TheJudgerManual testing273274--33.59--


ECM factoring results:
No ECM results for M56960207


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-04-27T10:23:00SMoffatSandi7263E172682F0635120.7
2020-09-15T04:01:29FineMojonBeast7263E172682F0635120.7


PRP results:
No PRP results for M56960207


P-1 factor-bounds graph:
B1 = 610000, B2 = 14182500 (P-1 stage 2)
B1 = 610000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-09-15T04:01:29+00:00