is 2 6945739 - 1
has 2090876 decimal digits
takes 1.515 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBE307B0BACBD6399double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.686468.0556%40000004568186709.06528.0810%146.751570.6370%2.5814%
PrimeNet2630.229863.4921%280007000000.02043.1619%0.250264.6464%1.1544%
GPU722674.278065.6716%450009000000.02902.2377%4.307066.4398%0.7682%
Difference+5+133.4084+2.3839%+3955000+455918670+9.0362+5.8433%+142.4446+4.1972%+1.8133%

Known prime factors:
No known factors for M6945739

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-10T00:00:00BJBv4_computers3000030000---0.009--0.234%
2011-04-15T21:11:00Carsten Kossendeyleela44500013350000---0.363--3.514%
2021-11-17T20:50:04Seth_TrManual testing30000007500000012---2.189--5.984%
2021-12-03T00:32:57Seth_TrManual testing4000000456818670---9.065--8.081%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21262--0.088--
1999-10-15T00:00:00ANONYMOUSv4_computers21263--0.230--
2001-09-10T00:00:00BJBv4_computers21263--0.230--
2014-02-09T10:11:00NesowaManual testing263264--0.283--
2014-02-16T12:45:00lycornManual testing264265--0.538--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.076--
2016-04-05T22:46:25Gordon SpenceManual testing266267--2.152--
2018-02-26T00:48:46-Anonymous-Manual testing267268--4.303--
2020-04-24T07:21:01TJAOIManual testing268269--8.607--
2021-07-28T22:40:51takahashiManual testing269270--17.21--
2021-08-11T16:37:32SRBaseManual testing270271--34.43--
2021-09-25T07:13:15SRBaseManual testing271272--68.86--


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)
1999-03-15T00:00:00ANONYMOUSv4_computersEB86C2EE9FF676__1.515
2000-02-01T00:00:00ANONYMOUSv4_computersEB86C2EE9FF676__1.515
2000-02-23T00:00:00spike66v4_computersBE307B0BACBD63991.515
2001-10-25T00:00:00BJBv4_computersBE307B0BACBD63991.515


PRP results:
No PRP results for M6945739


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456818670 (P-1 stage 2)
B1 = 3000000, B2 = 75000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 3000000 (P-1 stage 1)
B1 = 445000, B2 = 13350000 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2021-12-03T00:32:57+00:00