is 2 3336887 - 1
has 1004504 decimal digits
takes 0.350 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4AEE8211670D726Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26935.777968.1159%40000001500000001.82068.1314%37.598470.7085%2.5926%
PrimeNet2600.046063.3333%140002600000.00422.7840%0.050264.3541%1.0208%
GPU722641.066765.6250%180003000000.00511.7541%1.071766.2280%0.6030%
Difference+5+34.7112+2.4909%+3982000+149700000+1.8155+6.3773%+36.5267+4.4806%+4.4806%

Known prime factors:
No known factors for M3336887

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-04T06:46:00Carsten Kossendeydurandal15000206250---0.004--0.690%
2011-10-07T12:22:00harleeP4_260055000893750---0.015--1.597%
2012-11-28T14:01:00Squeeky_SquirrelP4_26002100004672500---0.069--3.124%
2018-08-15T10:51:09Jocelyn Larouchelow 4M4200001680000---0.074--2.641%
2018-08-17T20:35:23Jocelyn Larouchelow 4M4200003360000---0.088--3.181%
2018-08-18T12:00:13Jocelyn Larouchelow 4M4200003780000---0.092--3.273%
2020-06-27T15:39:29mikrMSI400000015000000012---1.821--8.131%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-29T07:58:00S485122USB-A260261--0.046--
2011-08-27T00:18:00markrManual testing21262--0.184--
2012-08-25T21:54:00GrunwalderGIMPManual testing21263--0.478--
2016-02-23T16:29:26Mark RoseManual testing262263--0.294--
2015-02-11T09:06:00VictordeHollanderManual testing263264--0.588--
2015-02-11T09:06:00VictordeHollanderManual testing264265--1.120--
2016-03-02T14:55:21ramgeisManual testing265266--2.239--
2017-03-02T18:04:36Gordon SpenceManual testing266267--4.479--
2018-11-05T15:44:31TJAOIManual testing267268--8.958--
2021-07-22T10:09:07TJAOIManual testing268269--17.92--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.729 GHz-days
Estimated T-Level:3.900
DigitsB1CurvesCompleteFacMiss
201100078 / 1000.78045.661%
255000078 / 2800.27975.649%

New Calculation Method

Total ECM effort:11.729 GHz-days
Estimated T-Level:3.900
DigitsB1CompleteFacMiss
20110003.0454.760%
25500000.28275.441%
302500000.01898.235%


ECM Summary

B1B2factorcurvesGHz-days
500005000000649.349
50000675000071.183
50000690000071.197


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-26T00:00:00ANONYMOUSv4_computers4AEE8211670D726B0.350


PRP results:
No PRP results for M3336887


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 420000, B2 = 3780000 (P-1 stage 2)
B1 = 420000, B2 = 3360000 (P-1 stage 2)
B1 = 420000, B2 = 1680000 (P-1 stage 2)
B1 = 210000, B2 = 4672500 (P-1 stage 2)
B1 = 420000 (P-1 stage 1)
B1 = 210000 (P-1 stage 1)
B1 = 55000, B2 = 893750 (P-1 stage 2)
B1 = 55000 (P-1 stage 1)
B1 = 15000, B2 = 206250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-07-27T05:45:00+00:00