is 2 87222139 - 1
has 26256481 decimal digits
takes 280.928 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L604642BA8D47E8__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276175.460064.4737%710000140225006.70323.4952%182.163165.7154%1.2417%
PrimeNet2715.481261.9718%360000170000005.91535.3979%11.396464.0246%2.0527%
GPU7227587.729064.0000%550000200000007.51763.9951%95.246665.4382%1.4382%
Difference+1+87.7310+0.4737%+160000-5977500-0.8144-0.4998%+86.9166+0.2772%+0.2772%

Known prime factors:
No known factors for M87222139

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2018-06-29T21:20:32Oliver KruseHalfPM1-27100001402250012---6.703--3.495%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-11-17T15:20:00Architects Cubedm1_62264265--0.043--
2013-03-05T20:22:00AxelssonManual testing265266--0.086--
2013-06-21T06:04:00PascalBieriManual testing266267--0.171--
2013-06-22T20:08:00PascalBieriManual testing267268--0.343--
2013-06-24T22:49:00PascalBieriManual testing268269--0.685--
2013-07-22T23:00:00SMoffatManual testing269270--1.371--
2013-08-16T14:59:00PEDManual testing270271--2.742--
2017-05-15T19:55:08Judge HaleManual testing271272--5.483--
2017-05-15T20:55:08Judge HaleManual testing272273--10.97--
2017-06-12T12:49:48ANONYMOUSManual testing273274--21.93--
2018-05-19T22:49:37RichD0Manual testing274275--43.87--
2018-05-23T16:10:04Strolling JellyfishManual testing275276--87.73--


ECM factoring results:
No ECM results for M87222139


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2018-11-29T04:01:18curtischum115--21s604642BA8D47E8__280.9


PRP results:
No PRP results for M87222139


P-1 factor-bounds graph:
B1 = 710000, B2 = 14022500 (P-1 stage 2)
B1 = 710000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-11-29T04:01:18+00:00