is 2 6958177 - 1
has 2094620 decimal digits
takes 1.517 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF49E910D707B6D7Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.270465.6716 %350000011589057480200.684016.0485 %204.954371.1808 %
Target2674.270465.6716 %4500045000000.09102.2383 %4.361366.4400 %
Difference---+3455000+11584557480+200.5930+13.8101%+200.5930+4.7408 %

Known prime factors (1 factor, 63.4 bits, 0.00091125% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6958177122239669942309503132063.406878388620628
22 × 3 × 283 × 367 × 704779
2012-08-213677047790.24700.01230.0227

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-09-10Mezzov4_computers35000437500--0.0181.742%
2012-08-21NesowaEPC2063.4060.0510.000%
2023-09-16ThaZ-170350000011589057480
skipped known factor: 12223966994230950313
--240.316.048%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-10-18ANONYMOUSv4_computers212620.044
2005-07-17David Campeauv4_computers212630.141


ECM factoring results:
No ECM results for M6958177


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02Noodleclausv4_computersF49E910D707B6D7D1.517
2001-11-03Mezzov4_computersF49E910D707B6D7D1.517


PRP results:
dateuseridcompidcofactorsres64
2018-01-27Oliver KruseGTX-6
12223966994230950313
56B6EDC750523C54
2019-02-10RuzovejMasa_notebook
12223966994230950313
56B6EDC750523C54


CERT results:
No CERT results for M6958177


P-1 factor-bounds graph:
B1 = 3500000, B2 = 11589057480 (P-1 stage 2)
B1 = 3500000 (P-1 stage 1)
B1 = 35000, B2 = 437500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
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270
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Last modified: 2024-03-13T02:15:48+00:00