20130920, 01:20  #1 
May 2007
Kansas; USA
2965_{16} Posts 
Sieving Drive all base 2/4 k's worked by CRUS
This is a sieving drive for all 16 k's for both sides of bases 2 & 4 that are currently being worked on by CRUS. Included in the drive are 11 k's for base 2 even & odd n, 4 k's for base 2 even k, and 1 k for base 4. (The remainder of base 4 k's are effectively included in base 2 even/odd n or are being worked by other projects.) I have spent the last several weeks sieving all 17 k's for the entire range of n=1M to 16777216 to P=100T as an extension to Jean Penne's sieve for the 12 k's for base 2 even/odd n and as a starting point for this effort.
The file contains 3 k's that have effectively already been sieved to a deep depth but for a smaller nrange by PrimeGrid. I am leaving them in there because we are sieving a much wider nrange and the cost to keep them in there is minimal. The file also contains all n=1M2M, which we have already tested. I am leaving the range in there because we will be doing doublechecks in the future and the cost to keep it in there is minimal. As we progress, we will determine testing break off points based on sieving and testing speed. Testing will be done in a new team drive. This will allow us to at least somewhat bridge the gap between our base 2/4 search depth and other project's depth. Like before, sr2sieve is what we will use. It is recommended that you run 64bit sr2sieve on a 64bit machine. Let us know if you need the executable or more detailed instructions on using it. Here is an example of the command to execute at the command prompt: sr2sieve p 115e12 P 125e12 i sieverieselsierpevenoddkn.txt The above would be if you were sieving P=115T125T. The file is listed after the "i" command and is the actual file name that is posted in a link below. Feel free to name it something shorter if you want or use the "srwork" older convention where you don't have to specify a file name. When complete, you should have a factors.txt file. Just post the file here in this thread or if it is too big, please Email the file to me at: gbarnes017 at gmail dot com A P=1T range should take ~56 CPU days on a modern 64bit machine. Please reserve ranges in multiples of P=1T and plan to reserve no more than ~10 days of work at a time. When making reservations, please post your estimated completion date. This can be seen in sr2sieve about one minute after you start your sieve. Here is a link to the latest sieve file: http://www.noprimeleftbehind.net/cru...enoddkn.zip All factors up to P=760T have been removed. We will remove additional factors as the drive progresses to slightly speed up sieving. Reservations: Code:
Prange reserved by status est. completion date 100T119T Lennart complete 119T129T KEP complete 129T140T Lennart complete 140T144T KEP complete 144T178T Lennart complete 178T188T KEP complete 188T410T Lennart complete 410T415T TheCount complete 415T420T Lennart complete 420T507T gd_barnes complete 507T580T Lennart complete 580T582T mdettweiler complete 582T760T Lennart complete Thank you, Gary Last fiddled with by gd_barnes on 20141129 at 07:54 Reason: status update 
20130920, 05:06  #2 
Aug 2010
Kansas
547 Posts 
Someone should really teach me how to read. Last fiddled with by c10ck3r on 20130920 at 05:08 
20130920, 06:31  #3  
May 2007
Kansas; USA
10597_{10} Posts 
Quote:
Gary Last fiddled with by gd_barnes on 20130920 at 06:36 

20130920, 18:20  #4 
"Lennart"
Jun 2007
2^{5}×5×7 Posts 
Reserving 100T110T
Lennart 
20130920, 19:40  #5 
"Lennart"
Jun 2007
2^{5}×5×7 Posts 
Reserving 110T113T
Lennart 
20130920, 19:55  #6 
"Lennart"
Jun 2007
2^{5}×5×7 Posts 
Reserving 113T119T
Lennart 
20130920, 20:43  #7 
May 2007
Kansas; USA
10,597 Posts 
After some thinking about c10ck3r's comments, I've decided that it's OK to make reservations as small as P=1T to allow our smaller searchers to participate in the sieving. I'd still like to ask that reservations be completed within ~10 days so that we can periodically remove a contiguous set of factors from the file for future sieving efficiency.
By my calculations, a P=1T range should take ~5 days on one core of a modern machine. 
20130925, 01:11  #8 
"Lennart"
Jun 2007
10001100000_{2} Posts 
110T119T complete
Lennart 
20130930, 02:18  #9 
"Lennart"
Jun 2007
2^{5}·5·7 Posts 
100T110T complete
Sorry I missed those. Lennart 
20130930, 04:58  #10 
May 2007
Kansas; USA
2965_{16} Posts 
Thanks Lennart. A new file has been posted with all factors up to P=119T removed.

20131005, 16:31  #11 
Quasi Admin Thing
May 2005
972_{10} Posts 
Reserving:
119T121T ETA is ~9.5 Days 
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