is 2 6942673 - 1
has 2089953 decimal digits
takes 1.514 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF7118112A28C3C12double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.747268.0556%40000004568186709.06528.0807%146.812370.6369%
Target2674.279965.6716%450009000000.02902.2375%4.308966.4397%
Difference+5+133.4673+2.3839%+3955000+455918670+9.0362+5.8432%+142.5035+4.1971%

Known prime factors:
No known factors for M6942673

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-10Team Prime Ribv4_computers35000542500---0.020--0.922%
2002-03-16Team Prime Ribv4_computers35000542500---0.020--0.922%
2002-04-28Team Prime Ribv4_computers35000542500---0.020--0.922%
2002-07-14Team Prime Ribv4_computers35000542500---0.020--0.922%
2004-05-25Team Prime Ribv4_computers35000542500---0.020--0.922%
2007-02-05Team Prime Ribv4_computers35000542500---0.020--0.922%
2012-08-19NesowaEPC850001508750---0.051--1.566%
2018-03-16Squeeky_Squirreli5-5250U_16004050001235250012---0.334--3.412%
2021-11-07Seth_TrManual testing20000005800000012---1.597--5.520%
2021-12-02Seth_TrManual testing4000000456818670---9.065--8.081%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-25ANONYMOUSv4_computers21262--0.088--
2004-02-07Sturle Sundev4_computers21263--0.230--
2014-02-09NesowaManual testing263264--0.283--
2014-02-16lycornManual testing264265--0.538--
2015-06-26VictordeHollanderManual testing265266--1.076--
2016-04-05Gordon SpenceManual testing266267--2.153--
2018-05-23ramgeisManual testing267268--4.305--
2020-04-24TJAOIManual testing268269--8.611--
2021-07-28takahashiManual testing269270--17.22--
2021-08-11SRBaseManual testing270271--34.44--
2021-10-10SRBaseManual testing271272--68.89--


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)
1999-03-01ANONYMOUSv4_computersF7118112A28C3C121.514
2001-09-10Team Prime Ribv4_computersF7118112A28C3C121.514
2002-03-16Team Prime Ribv4_computersF7118112A28C3C121.514
2002-04-28Team Prime Ribv4_computersF7118112A28C3C121.514
2002-07-14Team Prime Ribv4_computersF7118112A28C3C121.514
2004-05-25Team Prime Ribv4_computersF7118112A28C3C121.514
2007-02-05Team Prime Ribv4_computersF7118112A28C3C121.514


PRP results:
No PRP results for M6942673


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456818670 (P-1 stage 2)
B1 = 2000000, B2 = 58000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 405000, B2 = 12352500 (P-1 stage 2)
B1 = 405000 (P-1 stage 1)
B1 = 85000, B2 = 1508750 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 35000, B2 = 542500 (P-1 stage 2)
B1 = 35000 (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
this exponent TF target: 67
TF double-checked to: 67.8
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
Last modified: 2023-04-26T21:34:10+00:00