is 2 3270517 - 1
has 984524 decimal digits
takes 0.343 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LFE01A32F4805EF3Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26818.224967.6471%40000001500000001.82068.7790%20.045576.4260%13.0927%
PrimeNet2600.047063.3333%140002600000.00422.7740%0.051166.1073%2.7740%
GPU722641.088365.6250%170002800000.00481.6864%1.093167.3114%1.6864%
Difference+4+17.1366+2.0221%+3983000+149720000+1.8158+7.0926%+18.9524+9.1147%+9.1147%

Known prime factors (1 factor, 129.8 bits, 0.00396830% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
3270517117186675151137092769782183155270774728140129.784179156193273322066159237489294920
23 × 3 × 5 × 41 × 331 × 2137 × 4391 × 272039 × 1075493 × 40071169
1075493400711692020-12-064.843e+100.48730.6210

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-08T12:40:00Carsten Kossendeydurandal15000191250---0.004--0.786%
2011-09-18T14:00:00harleeP4_2600600001065000---0.017--1.938%
2014-06-26T21:21:00ANONYMOUSManual testing7962579625---0.012--0.754%
2014-10-10T20:28:00Jocelyn LaroucheManual testing9925099250---0.015--0.861%
2016-01-16T00:42:31Jocelyn LaroucheManual testing38340038340006---0.087--3.598%
2020-12-06T06:06:15mikrMSI40000001500000001240129.7841.8210.6873.6418.779%
2021-01-17T00:34:25Jocelyn LaroucheManual testing40340032705176---0.085--3.483%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-24T00:00:00ANONYMOUSv4_computers?260--0.023--
2009-04-03T10:35:00S485122USB-A260261--0.047--
2011-10-01T05:50:00Grant McCrackenthumper261262--0.094--
2013-01-03T08:49:00dbaughManual testing262263--0.300--
2015-02-07T18:05:00VictordeHollanderManual testing263264--0.600--
2015-02-07T18:05:00VictordeHollanderManual testing264265--1.142--
2015-06-28T13:57:00ThaManual testing265266--2.285--
2021-02-21T11:36:43Jocelyn LaroucheManual testing265266--2.285--
2021-02-22T09:03:46Jocelyn LaroucheManual testing266267--4.570--
2017-04-04T13:00:38Gordon SpenceManual testing266267--4.570--
2018-12-17T13:21:53TJAOIManual testing267268--9.140--


ECM factoring results:
Total ECM effort:2.183 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

ECM Summary

B1B2factorcurvesGHz-days
500005000000152.183


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-12T00:00:00ANONYMOUSv4_computersFE01A32F4805EF3F0.343
1999-06-26T00:00:00ANONYMOUSv4_computersFE01A32F4805EF3F0.343


PRP results:
dateuseridcompidcofactorsres64PRP
2020-12-10T03:15:22Sébastien BrouckePortable_Seb
1171866751511370927697821831552707747281
D4C32D5A3281A8__no
2020-12-11T04:58:00marssystemssystem11
1171866751511370927697821831552707747281
D4C32D5A3281A8D8no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (stage 2)
B1 = 4000000 (stage 1)
B1 = 383400, B2 = 3834000 (stage 2)
B1 = 403400, B2 = 3270517 (stage 2)
B1 = 403400 (stage 1)
B1 = 383400 (stage 1)
B1 = 60000, B2 = 1065000 (stage 2)
B1 = 99250 (stage 1)
B1 = 79625 (stage 1)
B1 = 60000 (stage 1)
B1 = 15000, B2 = 191250 (stage 2)
B1 = 15000 (stage 1)
103
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105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2021-02-22T09:03:46+00:00