is 2 6912133 - 1
has 2080760 decimal digits
takes 1.507 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3683E9931C61221Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272138.355868.0556%40000004568186709.06528.0773%147.420970.6358%2.5802%
PrimeNet2630.230963.4921%280007000000.02043.1594%0.251364.6455%1.1534%
GPU722674.298865.6716%450009000000.02902.2359%4.327866.4392%0.7675%
Difference+5+134.0570+2.3839%+3955000+455918670+9.0362+5.8414%+143.0932+4.1966%+1.8127%

Known prime factors:
No known factors for M6912133

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-24T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.234%
2011-09-01T10:54:00Carsten Kossendeymother44000013310000---0.361--3.504%
2021-11-08T18:09:35Seth_TrManual testing30000007500000012---2.189--5.981%
2021-12-01T13:04:52Seth_TrManual testing4000000456818670---9.065--8.077%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-07-21T00:00:00ANONYMOUSv4_computers21262--0.089--
2005-02-02T00:00:00ANONYMOUSv4_computers21263--0.231--
2014-02-09T10:09:00NesowaManual testing263264--0.284--
2014-02-17T19:28:00lycornManual testing264265--0.541--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.081--
2016-04-01T12:34:44Gordon SpenceManual testing266267--2.162--
2018-02-26T00:49:16-Anonymous-Manual testing267268--4.324--
2020-02-21T13:08:26mnd9Manual testing268269--8.649--
2021-07-18T04:14:51takahashiManual testing269270--17.30--
2021-08-16T15:33:17SRBaseManual testing270271--34.60--
2021-10-10T08:37:31SRBaseManual testing271272--69.19--


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_computers3683E9931C61221D1.507
2001-10-06T00:00:00ANONYMOUSv4_computers3683E9931C61221D1.507


PRP results:
No PRP results for M6912133


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 = 13310000 (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
109
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2021-12-01T13:04:52+00:00