is 2 6995161 - 1
has 2105754 decimal digits
takes 1.525 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L32857284F0AF0370double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.247865.6716 %445000135725000.36685.7637 %4.614667.6502 %
Target2674.247865.6716 %4500045000000.09102.2403 %4.338866.4407 %
Difference---+400000+9072500+0.2759+3.5234%+0.2759+1.2095 %

Known prime factors (1 factor, 67.3 bits, 0.00096183% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
69951611793549855536420582732167.28112819932632976
24 × 72 × 643 × 25430723
2018-02-25643254307235.46500.43830.8182

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-12-22davidcrossv4_computers3000030000--0.0090.538%
2011-09-08Carsten Kossendeymother4450001357250012--0.3675.764%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-29ANONYMOUSv4_computers212620.044
2004-04-09Sturle Sundev4_computers212630.140
2014-02-09NesowaManual testing2632640.281
2014-02-14lycornManual testing2642650.534
2015-07-03VictordeHollanderManual testing2652661.068
2016-04-27Gordon SpenceManual testing2662672.137
2018-02-26ANONYMOUSManual testing267268*
67.281
21
1.202


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)
1999-08-07ANONYMOUSv4_computers32857284F0AF03701.525
2002-02-24davidcrossv4_computers32857284F0AF03701.525


PRP results:
dateuseridcompidcofactorsres64
2018-03-04noknopcr2-srv
179354985553642058273
7E39501A8DFDC2A0
2019-02-21kkmrkkblmbrbkc5.large
179354985553642058273
7E39501A8DFDC2A0


CERT results:
No CERT results for M6995161


P-1 factor-bounds graph:
B1 = 445000, B2 = 13572500 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00