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 2005-04-08, 07:23 #12 robert44444uk     Jun 2003 Oxford, UK 111011111102 Posts Dont know I didn't know there was an upper limit, I just do it! I am using version 2.81, and I set max Mb ram to 100.0 I ran n=71 last night - only one value survived the sieve and the first pfgw run, and that turned out to be composite for k.2^71-1 So Anx1's record still stands. Regards Robert
 2005-04-08, 08:53 #13 Templus     Jun 2004 2·53 Posts I tried n=81 yesterday for 2
 2005-04-08, 10:49 #14 ltd     Apr 2003 11000001002 Posts Are n=74,75,76 free ? I would like to test them. Lars
2005-04-08, 11:00   #15
axn

Jun 2003

113558 Posts

Quote:
 Originally Posted by robert44444uk I didn't know there was an upper limit, I just do it! I am using version 2.81, and I set max Mb ram to 100.0
Hmmm.... Must be the version. I am using 2.82. If I put k higher than 2^32-1 it just wont budge :

But on the plus side, I went and wrote up a sieve program for myself. The initial results are *very* encouraging. I sieve all 8 forms simultaneously.

Some statistics. After sieveing for k < 10^10, with p < 1M, I get just 90 (count'em) candidates

 2005-04-08, 11:35 #16 axn     Jun 2003 3×5×17×19 Posts And the winner is: k=61574201535, n=80
2005-04-08, 13:26   #17
robert44444uk

Jun 2003
Oxford, UK

191810 Posts
For Lars

Quote:
 Originally Posted by ltd Are n=74,75,76 free ? I would like to test them. Lars
You might want to try a bit higher, given the latest record. This is addictive!!

Regards

Robert Smith

 2005-04-08, 15:17 #18 ltd     Apr 2003 22·193 Posts OK i take 100,101,102 Lars
 2005-04-08, 16:01 #19 axn     Jun 2003 3·5·17·19 Posts Another one for n = 80 k = 632893190475 !!
 2005-04-08, 16:17 #20 axn     Jun 2003 3·5·17·19 Posts n = 80 finished for k < 10^12. On to bigger n's
2005-04-08, 21:26   #21
ltd

Apr 2003

22×193 Posts

Quote:
 Originally Posted by axn1 Hmmm.... Must be the version. I am using 2.82. If I put k higher than 2^32-1 it just wont budge :
Strange i use 2.82 also and i have no problems sieving >2^32.

2005-04-09, 06:21   #22
axn

Jun 2003

484510 Posts

Quote:
 Originally Posted by ltd Strange i use 2.82 also and i have no problems sieving >2^32.
D'oh! It looks like I've run into a bug in NewPGen. Try putting kmax = 4294967296 (2^32). It doesnt do anything. If you put any other number in there (including really big numbers), it springs into action!

Well, anyway, my new sieve is a lot better suited for this search.

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