is 2 84557281 - 1
has 25454278 decimal digits
takes 263.860 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-LE621F718EDCFC4__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276180.989764.4737%675000133312506.17423.4239%187.163865.6901%1.2164%
PrimeNet2715.653961.9718%360000170000005.73105.3778%11.384964.0169%2.0451%
GPU7227590.493864.0000%550000190000007.03693.9416%97.530665.4190%1.4190%
Difference+1+90.4959+0.4737%+125000-5668750-0.8627-0.5177%+89.6332+0.2711%+0.2711%

Known prime factors:
No known factors for M84557281

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2017-11-22T16:10:26Oliver KruseHalfPM1-06750001333125012---6.174--3.424%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-24T16:20:00Architects Cubedm1_74264265--0.044--
2012-08-05T06:51:00Carsten KossendeyManual testing265266--0.088--
2013-08-18T09:22:00RobishManual testing266267--0.177--
2013-08-18T16:11:00RobishManual testing267268--0.353--
2013-08-19T17:42:00RobishManual testing268269--0.707--
2013-08-20T18:17:00RobishManual testing269270--1.414--
2013-11-12T05:15:00Choi4KANGboksa02270271--2.828--
2017-02-04T00:47:48ANONYMOUSManual testing271272--5.656--
2017-02-04T00:47:48ANONYMOUSManual testing272273--11.31--
2017-02-04T00:47:48ANONYMOUSManual testing273274--22.62--
2017-05-06T08:52:45ktonyManual testing274275--45.25--
2017-05-06T08:52:45ktonyManual testing275276--90.50--


ECM factoring results:
No ECM results for M84557281


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2018-10-02T23:12:00jjknwGen3E621F718EDCFC4__263.9


PRP results:
No PRP results for M84557281


P-1 factor-bounds graph:
B1 = 675000, B2 = 13331250 (P-1 stage 2)
B1 = 675000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-10-02T23:12:00+00:00