is 2 6945161 - 1
has 2090702 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-LC5D24B112E81CC3Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.697868.0556%40000004568186709.06528.0809%146.763070.6370%
Target2674.278465.6716%450009000000.02902.2376%4.307366.4398%
Difference+5+133.4195+2.3839%+3955000+455918670+9.0362+5.8433%+142.4557+4.1972%

Known prime factors:
No known factors for M6945161

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-24CaptainEntropyv4_computers3000030000---0.009--0.234%
2011-09-04Carsten Kossendeymother44000013640000---0.367--3.523%
2021-11-12Seth_TrManual testing30000007500000012---2.189--5.984%
2021-12-03Seth_TrManual testing4000000456818670---9.065--8.081%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11ANONYMOUSv4_computers21262--0.088--
2005-03-20ANONYMOUSv4_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--2.152--
2018-02-25-Anonymous-Manual testing267268--4.304--
2020-04-24TJAOIManual testing268269--8.608--
2021-07-28takahashiManual testing269270--17.22--
2021-08-11SRBaseManual testing270271--34.43--
2021-09-25SRBaseManual 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)
1999-03-15ANONYMOUSv4_computersC5D24B112E81CC3B1.514
2002-03-24CaptainEntropyv4_computersC5D24B112E81CC3B1.514


PRP results:
No PRP results for M6945161


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 = 440000, B2 = 13640000 (P-1 stage 2)
B1 = 440000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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105
106
107
103
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105
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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: 67.7
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2023-03-23T17:39:31+00:00