is 2 58476749 - 1
has 17603256 decimal digits
takes 123.938 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L86984EF5A083A0BAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27465.425464.8649%550000111375003.46303.7383%68.888466.1783%1.3134%
PrimeNet2692.041662.3188%260000110000002.59735.5465%4.638964.4088%2.0900%
GPU7227332.711264.3836%400000130000003.33904.0815%36.050265.8373%1.4537%
Difference+1+32.7142+0.4813%+150000-1862500+0.1240-0.3432%+32.8382+0.3411%+0.3411%

Known prime factors:
No known factors for M58476749

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-10-30T09:34:00Patrik Johanssontheta55000011137500---3.463--3.738%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers21253--2.05197e-5--
2000-02-09T00:00:00ANONYMOUSv4_computers21254--4.10393e-5--
2000-06-28T00:00:00ANONYMOUSv4_computers21256--0.000--
2000-06-29T00:00:00ANONYMOUSv4_computers21256--0.000--
2001-07-17T00:00:00ANONYMOUSv4_computers21257--0.000--
2002-09-29T00:00:00ANONYMOUSv4_computers21258--0.001--
2003-07-30T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-11-28T00:00:00ANONYMOUSv4_computers21261--0.005--
2016-02-23T17:05:39Mark RoseManual testing261263--0.022--
2008-11-04T10:16:00cameloidphi-phi263264--0.034--
2009-01-12T22:10:00Gnorfe_k_kontor264265--0.064--
2009-01-13T07:48:00Sturle Sundegaudi.ifi265266--0.128--
2009-03-20T18:44:00PiepenCC7CC774A266267--0.256--
2009-10-04T11:00:00Sturle Sundeginara.ifi267268--0.511--
2011-11-23T09:02:00rduerrManual testing268270--3.067--
2012-04-10T15:43:00MikeBerlinManual testing270271--4.089--
2012-04-10T23:18:00MikeBerlinManual testing271272--8.179--
2012-10-01T23:52:00Kyle AskineManual testing272273--16.36--
2014-12-19T02:12:00Brian LenhartManual testing273274--32.71--


ECM factoring results:
No ECM results for M58476749


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-07-18T23:11:00ixfd64dannyc-lab-186984EF5A083A0BA123.9
2021-07-23T01:53:02KelbPC86984EF5A083A0BA123.9


PRP results:
No PRP results for M58476749


P-1 factor-bounds graph:
B1 = 550000, B2 = 11137500 (P-1 stage 2)
B1 = 550000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-07-23T01:53:02+00:00