View Single Post
Old 2010-04-14, 13:31   #1
rogue
 
rogue's Avatar
 
"Mark"
Apr 2003
Between here and the

169816 Posts
Default Sierp base 63 - team drive #5

I have been running some tests to estimate the effort involved for S63. I would like to get it to n=10000. Based upon my tests I estimate that close to 70% of the k (of 237,036) have primes for n < 10000. Based upon my tests I also estimate that testing 10000 k to n=10000 will take about 2 months on a single core of a C2D at 2.4 GHz.

I used srsieve to sieve to a depth of 1e10. I then took the ABC file that srsieve output (using the -w switch) and modified the first line to read as follows:

ABC $a*63^$b$c // {number_primes,$a,1}

I then ran the file (sr_63.pfgw) through PFGW without any additional switches. In my test I only did 100 k, so my test results are an extrapolation. You can certainly use sr2sieve, but you would have to break up the one file into multiple files. It might save some time sieving, but takes more time to manage.

I have created 23 files, each with 10,000 k (I've already taken the last file with 7036 k). To join in this effort, please select a file from one of the following links and state your reservation into this thread. When you have completed processing the file, please zip up the primes you have found and attach them to a post in this thread. Based upon the success of this thread I might do a second drive in the future.

Group 1 (complete by Mathew Steine; 2444 k's remaining)
Group 2 (complete by Lennart; 2381 k's remaining)
Group 3 (complete by Lennart; 2419 k's remaining)
Group 4 (complete by Lennart; 2343 k's remaining)
Group 5 (complete by Lennart; 2365 k's remaining)
Group 6 (complete by Lennart; 2360 k's remaining)
Group 7 (complete by rogue; 2456 k's remaining)
Group 8 (complete by Xentar; 2322 k's remaining)
Group 9 (complete by Lennart; 2384 k's remaining)
Group 10 (complete by rogue; 2393 k's remaining)
Group 11 (complete by appeldorff; 2368 k's remaining)
Group 12 (complete by Mini-Geek; 2437 k's remaining)
Group 13 (complete by rogue; 2394 k's remaining)
Group 14 (complete by rogue; 2462 k's remaining)
Group 15 (complete by kar_bon; 2369 k's remaining)
Group 16 (complete by Lennart; 2359 k's remaining)
Group 17 (complete by rogue; 2327 k's remaining)
Group 18 (complete by rogue; 2389 k's remaining)
Group 19 (complete by rogue; 2348 k's remaining)
Group 20 (complete by rogue; 2379 k's remaining)
Group 21 (complete by rogue; 2427 k's remaining)
Group 22 (complete by rogue; 2344 k's remaining)
Group 23 (complete by rogue; 2380 k's remaining)
Group 24 (complete by rogue; 1698 k's remaining)

Any comments or suggestions are welcome.

The drive is now complete! 180488 primes were found. 56548 k's remain at n=10K. 76.14% of all k's were eliminated for n=1K-10K!

Last fiddled with by gd_barnes on 2011-02-22 at 21:12 Reason: status update
rogue is offline   Reply With Quote