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 2012-07-15, 23:38 #1046 rogue     "Mark" Apr 2003 Between here and the 2×592 Posts Reserving R45. I probably won't be working on this for about two months, but as I will be away from home for most of the month of August, I need to reserve now so that I can sieve and drop into my server before I leave just in case I get lucky and find a multiple R30 primes in the range I'm working on.
 2012-07-30, 17:22 #1047 grueny   Jul 2010 Germany 1458 Posts reserving r72 to 500e3
 2012-08-01, 22:20 #1048 MyDogBuster     May 2008 Wilmington, DE 22·23·31 Posts S79 Reserving S79 as new to n=2.5K ck=2212516
 2012-08-07, 01:47 #1049 MyDogBuster     May 2008 Wilmington, DE B2416 Posts S79 Sierp Base 79 Conjectured k = 2212516 Covering Set = 5, 7, 43, 6163 Trivial Factors k == 1 mod 2(2) and k == 2 mod 3(3) and k == 12 mod 13(13) Found Primes: 655111 k's - File emailed Remaining: 19167 k's - Tested to n=2.5K - File emailed Trivial Factor Eliminations: 425484 k's MOB Eliminations: 6495 k's - File emailed Base Released
2012-08-07, 05:32   #1050
gd_barnes

"Gary"
May 2007
Overland Park, KS

72×241 Posts

Quote:
 Originally Posted by MyDogBuster Sierp Base 79 Remaining: 19167 k's - Tested to n=2.5K - File emailed Base Released
I have posted the k's remaining in a link on the reservations page.

2012-08-11, 21:23   #1051
grobie

Sep 2005
Raleigh, North Carolina

15116 Posts
Update

Quote:
 Originally Posted by grobie Update k8-510 complete to n=50k (ran 4 k's for a test) no primes remainig 172 k's sieve completed and tested to n=26k 1 Prime 23204*97^25772-1 next post when completed
All k's for R97 now at 30.3k the following primes found:

25242*97^25924-1
7308*97^26259-1
21720*97^27152-1
2526*97^28074-1
14118*97^28888-1
6182*97^30313-1

Last fiddled with by grobie on 2012-08-11 at 21:24

 2012-08-25, 00:17 #1052 Mathew     Nov 2009 35010 Posts I would like to reserve R51 k=1M-1.1M to n=25K
 2012-09-01, 23:15 #1053 f1pokerspeed   Jun 2012 11010102 Posts Looking at Sierp, Base 63 I see that S63 has about 33,000 k's remaining at n=25k - possibly this could be a target for a mini-drive? I guess it wouldn't hurt to try and sieve this one for a bit on another core, there's about 168.86 million candidates per n=5k range so a sieve to n=100k is 2.5329 billion candidates. Surely it would be easy to find a few primes here... I'll contribute a core of my laptop towards on and off sieving of base 63 to n=100k, that is, if I have the RAM...
2012-09-01, 23:44   #1054
gd_barnes

"Gary"
May 2007
Overland Park, KS

72×241 Posts

Quote:
 Originally Posted by f1pokerspeed I see that S63 has about 33,000 k's remaining at n=25k - possibly this could be a target for a mini-drive? I guess it wouldn't hurt to try and sieve this one for a bit on another core, there's about 168.86 million candidates per n=5k range so a sieve to n=100k is 2.5329 billion candidates. Surely it would be easy to find a few primes here... I'll contribute a core of my laptop towards on and off sieving of base 63 to n=100k, that is, if I have the RAM...
I do not recommend this. I think you'll fairly quickly see why once you start on it.

If you'd like to find a lot of primes quickly, consider taking R106 to n=25K. It has 1641 k's remaining at n=10K. I will be done fully sieving it for n=10K-25K within a week and could send you the file.

Last fiddled with by gd_barnes on 2012-09-01 at 23:49

2012-09-02, 06:42   #1055
Puzzle-Peter

Jun 2009

22·52·7 Posts

Quote:
 Originally Posted by f1pokerspeed I see that S63 has about 33,000 k's remaining at n=25k - possibly this could be a target for a mini-drive? I guess it wouldn't hurt to try and sieve this one for a bit on another core, there's about 168.86 million candidates per n=5k range so a sieve to n=100k is 2.5329 billion candidates. Surely it would be easy to find a few primes here... I'll contribute a core of my laptop towards on and off sieving of base 63 to n=100k, that is, if I have the RAM...
To add some numbers to what Gary said: I took S63 from n=10k to n=25k. I sieved on 24 cores (3 dual-quadcore machines with 48GB RAM each) and tested with 100+ cores at peak performance. Even so it took about half a year to do the job (not 24/7, more like 12/7). 25k<n<100k deals with less candidates but the tests are taking more time so the grand total will be even more work. The same goes for sieving. Less candidates but a much bigger range which will more or less even out.

Any effort and work done is appreciated but please be aware of what you're up to here. The quickest way to find lots of primes is scripting some R3 to n=25k. Now that all tested k's are being reserved to n=100k or higher it might be a good moment to raise the k limit.

 2012-09-03, 12:38 #1056 firejuggler     "Vincent" Apr 2010 Over the rainbow 22×7×103 Posts Sent to gary a sieve (40e9) file for R51, k from 25k to 1M (1160 k) from n=25k to 50k (1042762 test) Last fiddled with by firejuggler on 2012-09-03 at 12:39

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