20091003, 07:47  #45 
Jun 2003
Oxford, UK
2,039 Posts 
I spoke too soon, the program fell over.
progress.txt c 1 E 60 iteration 0 I 0 Error message: E+1 should be prime. But E+1=61 prime. Until fixed will take Sierpinski 58 Last fiddled with by robert44444uk on 20091003 at 07:48 
20091003, 18:47  #46  
"Robert Gerbicz"
Oct 2005
Hungary
11000100000_{2} Posts 
Quote:
Done that modification it isn't slower, it is writing the record table to a txt file. Be careful, it won't use this txt file at the start of the program even if there is a recordtable.txt file on the folder. The format of the text file: level n y E as in your paper. And now there is much less screen output of the status (there is at least 5 seconds between consecutive outputs). "Error message: E+1 should be prime. But E+1=61 prime." Corrected, it is a minor bug, doesn't effect your earlier computations. See my page to download the new exe. Last fiddled with by R. Gerbicz on 20091003 at 18:54 

20091004, 09:22  #47 
Jun 2003
Oxford, UK
2,039 Posts 
Robert G
The racing table works very well...perfect. The E60 problem is fixed. Please note that there are other E values that could be checked that are not p1, as their profiles are slightly different. What is the highest E that can be checked? It was not possible to go beyond E=255 with Axn1's program. A couple of minor improvements that could be made to the output files: recordtable.txt  add whether it is Sierpinski (S) or Riesel (R) results.txt  (i) add a date and time stamp to the output (ii) add the iteration and I value of discovered candidates. This will help build a statistical model for the possible number of VPS at a given level Regards Robert S 
20091004, 12:55  #48  
"Robert Gerbicz"
Oct 2005
Hungary
3040_{8} Posts 
Quote:
E<sievelimit (default=2^27) should be true. But note that choosing a large E it might cause that there is no payam/vps number up to y=2^60, (this is the limit for y value in the code). Probably for E>1000 it is true. Last fiddled with by R. Gerbicz on 20091004 at 12:56 

20091004, 16:43  #49 
Jun 2003
Oxford, UK
2,039 Posts 
Great
Will run on 3 machines 4 cores tonight. 
20091005, 10:46  #50 
Jun 2003
Oxford, UK
2,039 Posts 
Software fixes all working well !!

20091007, 16:54  #51  
Jun 2003
Oxford, UK
2,039 Posts 
Quote:
R 1709333922219 60 100/5811 106/10000 Still finding plenty of VPS, will post at the weekend 

20091008, 10:58  #52 
Jun 2003
Oxford, UK
2,039 Posts 
In 11 days I found 80 new VPS, to add to the 320 already known before Robert's program became available, so that is 411 including Robert's 11 finds.
In 6 weeks I can singlehandedly double the known VPS, which were found over a period of 6 years None of the 80 have > 106/10000 though. The juicy ones are still to come. Last fiddled with by robert44444uk on 20091008 at 11:06 
20091016, 11:51  #53 
Jun 2003
Oxford, UK
2,039 Posts 
After 2 weeks still do not have one 110/10000 but several new drag racing records:
New absolute drag racing records: S 391170716069 60 48/271 S 391170716069 60 49/288 S 391170716069 60 50/292 S 2121365747455 58 75/1252 S 2442649832339 58 77/1409 S 2442649832339 58 78/1418 S 2442649832339 58 79/1421 S 2442649832339 58 80/1557 S 2442649832339 58 81/1634 Best Riesel at a given n  at least 1 Sierpinski beats or equals these R 90235721373 60 21/41 R 1654011147057 60 83/2080 R 1654011147057 60 84/2123 R 1654011147057 60 85/2132 R 1654011147057 60 86/2200 R 1654011147057 60 87/2201 R 1654011147057 60 92/3326 R 1654011147057 60 93/3765 R 1654011147057 60 94/3827 R 1654011147057 60 95/3967 R 1709333922219 60 98/5269 R 1709333922219 60 99/5321 R 1709333922219 60 104/7266 Best Sierpinski at a given n  at least one Riesel beats or equals these: S 2618651601039 58 9/9 S 2618651601039 58 10/10 S 391170716069 60 38/142 S 391170716069 60 39/143 S 391170716069 60 40/166 S 391170716069 60 41/167 S 391170716069 60 42/173 S 391170716069 60 43/185 S 391170716069 60 44/199 S 391170716069 60 46/234 S 2604607723337 60 47/254 S 2604607723337 60 57/471 S 2442649832339 58 76/1397 The Riesel record to 100 primes remains unbeaten Last fiddled with by robert44444uk on 20091016 at 12:02 
20091016, 12:01  #54 
Jun 2003
Oxford, UK
2039_{10} Posts 
As of yesterday (2 weeks in) I have found 86 new Sierpinski VPS and 105 Riesel VPS. One is 108/10000, there are 3 at 107/10000 and 5 at 106/10000.
I have also reserved Riesel 52 from Iteration 2  just found my first 109/10000 after only 12 hours of searching The very best performer at 10000, with 116 primes, found 6 years ago, looks a tough one to beat, although it is only 7th best Sierpinski performer overall S 2158430601663 66 100/5496 116/10000 153/174566 
20091016, 13:30  #55 
"Robert Gerbicz"
Oct 2005
Hungary
3040_{8} Posts 

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Semiprime and nalmost prime candidate for the k's with algebra for the Sierpinski/Riesel problem  sweety439  sweety439  11  20200923 01:42 
Dual Sierpinski/Riesel prime  sweety439  Conjectures 'R Us  0  20161207 15:01 
Sierpinski/ Riesel bases 6 to 18  robert44444uk  Conjectures 'R Us  139  20071217 05:17 
Sierpinski/Riesel Base 10  rogue  Conjectures 'R Us  11  20071217 05:08 
Sierpinski / Riesel  Base 22  michaf  Conjectures 'R Us  49  20071217 05:03 