20150325, 07:32  #166 
Romulan Interpreter
Jun 2011
Thailand
8583_{10} Posts 
I went kookoo, giving replies to myself...
Another stupid question: my srXsieve seems to cont the "seconds per factor" from the beginning of sieving, which is wrong, as the sieving was much faster in the beginning and it is much slower now. I am sure I read somewhere something related to "the last 30 factors found", however I can't remember where and about which program (it may be a different program, and/or my perception may be subjective, however the siever spits a line with a factor every ~5 seconds, and it still says that it is finding a factor per second). What I am missing? (I think this is sr1sieve 1.4.5) 
20150325, 14:34  #167  
"Mark"
Apr 2003
Between here and the
2^{3}×5^{2}×29 Posts 
Quote:


20150328, 08:34  #168 
Romulan Interpreter
Jun 2011
Thailand
3×2,861 Posts 
Another stupid question: looking to this list, I see two even numbers inside. Any special reason of that? I assumed is something I don't know, and looked for those numbers on "sister projects" sites, they don't have them, and people are talking only about "50 k's", not 52.

20150328, 08:54  #169  
May 2007
Kansas; USA
2·5^{2}·7·29 Posts 
Quote:
We believe that it is incorrect to not include multiples of the base in the conjectures since they can yield different primes than k divided by the base. (The starting bases script take it all into account.) I have chosen not to press the issue with PrimeGrid on their Riesel project and their Extended Sierp project partly because I thought it was an interesting excercise for us to do the few k's remaining and partly because I did not want to get into a debate about what the mathematicians had conjectured over 60 years ago. Edit: If you would like to help in testing these k's along with other base 2/4 k's that we have searched to n=~2.9M base 2, I could use some help on PRPnet port 1400. See details at http://www.mersenneforum.org/showpos...81&postcount=1. It would be nice to get them pushed further ahead faster since all other base 2 k's have been searched much further. Last fiddled with by gd_barnes on 20150328 at 09:03 Reason: edit 

20150328, 09:29  #170 
Romulan Interpreter
Jun 2011
Thailand
3×2,861 Posts 
Thanks for the prompt reply. It (somehow) makes sense. I will have a look to your link right now.

20150328, 13:39  #171  
Quasi Admin Thing
May 2005
2^{2}×229 Posts 
Quote:


20150530, 20:11  #172 
Jun 2009
1235_{8} Posts 
I seem to remember people sieving Riesel and Sierpinski candidates for the same base in one file. How do you do that? I am looking at S/R 22 which are both at n=1M now.

20150530, 21:02  #173  
May 2007
Kansas; USA
2·5^{2}·7·29 Posts 
Quote:
5128*22^n+1 3656*22^n1 Then use sr2sieve to continue sieving the output file from the above. With one k on each side, base 22 is a great base to do this on. Last fiddled with by gd_barnes on 20150530 at 21:04 

20150531, 06:34  #174 
Jun 2009
29D_{16} Posts 
Haha this is so easy I didn't even think it would work... thanks!

20150706, 10:12  #175  
"Serge"
Mar 2008
Phi(3,3^1118781+1)/3
21542_{8} Posts 
Quote:
Disclaimer: this script is only slightly adapted from the base=2 (which is obviously squarefree) to a general base version and as such is not taking into account special k <> b interactions when the base is not squarefree (for these, use a sheet of paper, pencil and some thought; plus, the isPower script is somewhere here, on the forum); however, a lot of differences of squares, and sum and diffs of odd powers will be removed (e.g. try S618 or R79 or R88). And only the simplest Aurifeuillian will be removed from the Sierp series (most likely it will only happen when k=2500: 50*b^{2m}+10*b^{m}+1  2500*b^{4m}+1; all other Aurifeuillians have a covering set of tiny factors). 

20160602, 19:41  #176 
Jun 2009
3×223 Posts 
What's the latest version of srsieve? I could find source code for 1.0.7 but the latest executable I found is 0.6.17. Is there a more recent executable for 64 bit linux somewhere?

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