is 2 6959789 - 1
has 2095106 decimal digits
takes 1.518 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L57BA6B8591371125double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.408468.0556%40000004568186709.06528.0826%146.473670.6375%
Target2674.269465.6716%450009000000.02902.2384%4.298366.4400%
Difference+5+133.1391+2.3839%+3955000+455918670+9.0362+5.8442%+142.1753+4.1974%

Known prime factors:
No known factors for M6959789

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16dtlgcv4_computers3000030000---0.009--0.234%
2002-10-19dtlgcv4_computers3000030000---0.009--0.234%
2011-05-19Carsten Kossendeyleela44500013350000---0.363--3.515%
2021-11-09Seth_TrManual testing30000007500000012---2.189--5.985%
2021-12-04Seth_TrManual testing4000000456818670---9.065--8.083%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11ANONYMOUSv4_computers21261--0.044--
1998-08-02ANONYMOUSv4_computers21262--0.088--
1999-12-30ANONYMOUSv4_computers21263--0.229--
2000-02-01ANONYMOUSv4_computers21263--0.229--
2000-03-15ANONYMOUSv4_computers21263--0.229--
2000-05-24ANONYMOUSv4_computers21263--0.229--
2000-07-03ANONYMOUSv4_computers21263--0.229--
2001-09-16dtlgcv4_computers21263--0.229--
2002-10-19dtlgcv4_computers21263--0.229--
2014-02-09NesowaManual testing263264--0.282--
2014-02-16lycornManual testing264265--0.537--
2015-06-26VictordeHollanderManual testing265266--1.074--
2016-04-06Gordon SpenceManual testing266267--2.147--
2018-02-25-Anonymous-Manual testing267268--4.295--
2020-04-24TJAOIManual testing268269--8.590--
2021-08-02takahashiManual testing269270--17.18--
2021-08-13SRBaseManual testing270271--34.36--
2021-09-28SRBaseManual testing271272--68.72--


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)
1999-05-02ANONYMOUSv4_computers7225E8BB44CBDB__1.518
1999-12-30ANONYMOUSv4_computers57BA6B85913711251.518
2000-02-01ANONYMOUSv4_computers57BA6B85913711251.518
2000-03-15ANONYMOUSv4_computers57BA6B85913711251.518
2000-05-24ANONYMOUSv4_computers57BA6B85913711251.518
2000-07-03ANONYMOUSv4_computers57BA6B85913711251.518
2001-11-24dtlgcv4_computers57BA6B85913711251.518
2002-10-19dtlgcv4_computers57BA6B85913711251.518


PRP results:
No PRP results for M6959789


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
261
this exponent TF target: 67
TF double-checked to: 67.7
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
Last modified: 2023-03-23T17:39:31+00:00