20201130, 17:40  #221 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK
2^{4}×3×101 Posts 
Having lots of fun running P1 with not the recommended optimized B1/B2 bounds but even though I am getting satisfying rate of factors for range below 7.8M. Work was taken from mersenne.ca at the "poorly P1 blablabla" link.

20201130, 18:15  #222 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
13·349 Posts 

20201130, 18:23  #223 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK
2^{4}·3·101 Posts 

20201208, 04:18  #224 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
13×349 Posts 

20201216, 05:07  #225 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
10671_{8} Posts 
Few more TF ranges up for grabs.....
Available now (P1 done)
29.1 35.5 49.4 A little more P1 is in progress 30.1 36.2 A little more P1 would be beneficial but not essential 36.5 38.2 
20201216, 06:48  #226 
Apr 2010
Over the rainbow
2·1,259 Posts 
I was thinking about doing a PM1 B1=500e3 B2 =10e6 on the 2727.1 range ... Starting at about the new year. is the range availlable?

20201216, 15:49  #227  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
13×349 Posts 
Quote:
In my humble opinion if you mean 27.0 that is a tough one. I'm not trying to talk you out of it, just want to be sure you know what you are getting into. If you mean 27.1 that is much closer/easier. Based on a lot of math I use to determine the best way to clear these ranges, I think your bounds could be higher, though. HERE IS THE MATH I USE: The 27.0 range needs 176 more factors. TF alone would take too much work.. Each bit of TF clears a little over 1% (of 2175 ... 25 would be generous); so we expect something like: TF7071: 217525=2150 (8.85 GhzDays per assignment) TF7172: 215025=2125 (17.7) TF7273: 212525=2100 (35.5) TF7374: 210025=2075 (71.0) TF7475: 207525=2050 (142.0) I'm not sure we want to go this high so TF alone is not the answer. So we need at least 50 factors from P1; either before TF or after. There are 860 that have had a low B1=B2; about 420e3 For these 860 your proposed bounds have an expected success rate of close to 3% or about 25 factors according to these: https://www.mersenne.ca/prob.php?exp...0000&b2=420000 https://www.mersenne.ca/prob.php?exp...00&b2=10000000. The remaining 1300 or so have current higher B1/B2 which would diminish your success rate if you continue to P1 these as well. Something like a 2% success rate here gives another 26 factors....we're getting closer. But I'm not sure we want to P1 all 2175 exponents either. On the other hand if you used bounds of 1e6,20e6 you'll get another 1% (granted for double the work; 2.7 vs 1.35 GhzDays each). https://www.mersenne.ca/prob.php?exp...00&b2=20000000 So out of the 860 you would get about 34 factors. And if your goal is 50 P1 factors you need to P1 a lot less of the remaining 1300 exponents. On the third hand (hahaha), sometimes I will use the lower B1/B2 for the exponents that have a current B1=B2 and more aggressive B1/B2 for the others. I have a spread sheet that helps me choose. CONFUSED.....or maybe you are way better at stats than me and know all this and more. Anyway thanks a lot and anything you choose is greatly appreciated. Last fiddled with by petrw1 on 20201216 at 15:52 

20201216, 23:47  #228 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
13·349 Posts 
I've got 29.1

20201217, 19:45  #229 
P90 years forever!
Aug 2002
Yeehaw, FL
7,307 Posts 
I'm looking for volunteers to test a prerelease of version 30.4. 30.4 is a nearly complete rewrite of the ECM and P1 code.
Useful testing would include: 1) rerun successful P1 and ECM attempts to make sure the new code does not miss any factors. 2) make sure save and restore work 3) find bugs reading old save files 4) testing various high and low memory configurations 5) report back on whether (how much) the new code is faster and finally... 6) run the improved code to see if it is finding about the expected number of new factors. Any interest? Please specify Windows or Linux. New features include:  better use of available memory for ECM and P1 stage 2  small speed improvements in ECM stage 1  selection of optimal B2 in both ECM and P1  deprecate Brent Suyama (more efficient to put that effort into a larger B1) 
20201217, 21:16  #230 
"Oliver"
Sep 2017
Porta Westfalica, DE
110010111_{2} Posts 
Wonderful! I'm looking forward to this. I could try Windows and Linux both, 64 bits. Thank you!

20201217, 21:22  #231  
If I May
"Chris Halsall"
Sep 2002
Barbados
2×3×1,567 Posts 
Quote:
Would love to give it a whirl if you don't there's (much) risk of missed factors. (If a bug is found they can simply be rerun.) 

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