is 2 6965131 - 1
has 2096714 decimal digits
takes 1.519 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCB8830D1F6D9BA6Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.303068.0556%3000000750000002.18885.9856%139.491969.9676%1.9121%
PrimeNet2630.229163.4921%280007000000.02043.1634%0.249664.6469%1.1549%
GPU722674.266165.6716%450009000000.02902.2387%4.295166.4401%0.7685%
Difference+5+133.0369+2.3839%+2955000+74100000+2.1599+3.7469%+135.1968+3.5275%+1.1436%

Known prime factors:
No known factors for M6965131

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.234%
2011-09-07T05:29:00Carsten Kossendeymother44000013640000---0.367--3.525%
2021-11-17T18:18:33Seth_TrManual testing30000007500000012---2.189--5.986%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-27T00:00:00ANONYMOUSv4_computers21262--0.088--
2005-07-17T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.282--
2014-02-15T15:55:00lycornManual testing264265--0.536--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.073--
2016-04-25T00:49:44Gordon SpenceManual testing266267--2.146--
2018-02-27T00:21:59-Anonymous-Manual testing267268--4.292--
2020-04-24T07:20:57TJAOIManual testing268269--8.583--
2021-08-04T22:39:20takahashiManual testing269270--17.17--
2021-09-06T18:06:08SRBaseManual testing270271--34.33--
2021-09-25T07:15:02SRBaseManual testing271272--68.66--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computersCB8830D1F6D9BA6C1.519
2001-12-08T00:00:00ANONYMOUSv4_computersCB8830D1F6D9BA6C1.519


PRP results:
No PRP results for M6965131


P-1 factor-bounds graph:
B1 = 3000000, B2 = 75000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 440000, B2 = 13640000 (P-1 stage 2)
B1 = 440000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2021-11-17T18:18:33+00:00