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-   -   Sierp. base 6 team sieve (https://www.mersenneforum.org/showthread.php?t=10150)

 mdettweiler 2008-03-25 20:28

Sierp. base 6 team sieve

[B]Note to all: at this point (p=21T) we are well past optimal sieve depth for the entire range up to n=400K. As such, no more sieving will be needed for quite a while, and I'll lock this thread until then. (Actually, we'll probably end up starting a new thread for future sieving after that point, anyway...)[/B]

Hi all,

Gary and I have decided to do a team sieve for all the remaining Sierpinski base 6 k's, similar to the [URL="http://www.mersenneforum.org/showthread.php?t=9996"]doublecheck sieving[/URL] that we did at NPLB. Everything is just the same as with the doublecheck sieving, except that there's a lot less k's, and of course that the k's and ranges are different. :smile:

The sieve will be for the range of n=100K-400K. As we progress, we will calculate the optimal depth for various ranges (i.e. 100K-200K, 200K-300K, etc.) and break them off for PRPing as soon as the sieve reaches that depth.

Reservations of all sizes are welcome--feel free to take whatever you feel you can complete in a reasonable amount of time. (Please give status reports at least every two weeks, preferably more frequently). :smile:

The sieve file can be downloaded [URL="http://www.mersenneforum.org/attachment.php?attachmentid=2395&d=1208153814"]here[/URL]. It contains one file, "sr2data.txt", which is our sieve file. Extract it to the folder containing your copy of sr2sieve (if you don't have the latest version already, get it [URL="http://www.geocities.com/g_w_reynolds/sr2sieve/"]here[/URL]--be sure to get version 1.7.6 or later, since a big speed boost was added in that version!). Then, make a new text file called "sr2work.txt". Open it in a text editor, and enter your range on the first line, like in this example (for 10G-20G):
[code]10-20[/code]You can queue up additional ranges by adding more lines, each containing another range in that same format.

When your range is done, email the factors.txt file to me at [EMAIL="bugmesticky@googlemail.com"]bugmesticky@googlemail.com[/EMAIL] (as an attachment, please, not in the body of the message). Then, report the range as complete here in this thread, and, if you wish, reserve another range and start the process over again! :smile:

[code]Range Reserved by Status
------------------------------------
8210G-21000G KriZp complete
8200G-8210G CedricVonck complete
8000G-8200G grobie complete
7000G-8000G KriZp complete
6510G-7000G gd_barnes complete
6500G-6510G Anonymous complete
6000G-6500G KriZp complete
5200G-6000G em99010pepe complete
4700G-5200G gd_barnes complete
3500G-4700G em99010pepe complete
3400G-3500G gd_barnes complete
3250G-3400G grobie complete
3000G-3250G gd_barnes complete
2500G-3000G KriZp complete
2000G-2500G tnerual complete
1750G-2000G Anonymous complete
1500G-1750G gd_barnes complete
1200G-1500G KriZp complete
1000G-1200G tnerual complete
750G-1000G KriZp complete
500G-750G gd_barnes complete
210G-500G KriZp complete
200G-210G Anonymous complete
125G-200G KriZp complete
70G-125G gd_barnes complete
20G-70G KriZp complete
0-20G Anonymous complete
[/code]As we break off ranges of n, they will be added to the 3rd Drive. All k's are included in the drive for n>100K.

Let's get rolling! :maybeso:

 mdettweiler 2008-03-25 23:59

Reserving 10G-20G. :smile:

 KriZp 2008-03-26 00:13

reserving 20-40

 mdettweiler 2008-03-26 00:15

[quote=KriZp;129747]reserving 20-40[/quote]
Thanks for helping out, and welcome to Conjectures 'R Us! :smile:

 KriZp 2008-03-26 01:19

thanks for the warm welcome, you guys seem like a friendly bunch :) I'll take another 30G to keep my Athlon64 from running out of work while I sleep. I'm sieving @1500kp/s.

reserving 40G-70G

 mdettweiler 2008-03-26 02:59

[quote=KriZp;129754]thanks for the warm welcome, you guys seem like a friendly bunch :) I'll take another 30G to keep my Athlon64 from running out of work while I sleep. I'm sieving @1500kp/s.

reserving 40G-70G[/quote]
Okay, great! :smile:

And while I'm at it, 10G-20G is finished. :smile:

 mdettweiler 2008-03-26 03:06

A new sieve file is now available, sieved to p=20G. You can get it [url=http://bugmesticky.googlepages.com/CRUS-sierp6_20G.zip]here[/url]; I also updated the link in the first post of this thread.

Note: In case anyone was wondering, yes, you can switch to a newer sieve file in the middle of a range--just replace sr2data.txt with the new one, and shut down/restart sr2sieve. :smile:

 gd_barnes 2008-03-26 04:56

[quote=Anonymous;129761]A new sieve file is now available, sieved to p=20G. You can get it [URL="http://bugmesticky.googlepages.com/CRUS-sierp6_20G.zip"]here[/URL]; I also updated the link in the first post of this thread.

Note: In case anyone was wondering, yes, you can switch to a newer sieve file in the middle of a range--just replace sr2data.txt with the new one, and shut down/restart sr2sieve. :smile:[/quote]

Very good. I didn't know that. I just always started an entirely new sieve. That'll become necessary as we find some more primes for n<100K and you're able to remove those k's from the file.

Gary

 mdettweiler 2008-03-26 05:10

[quote=gd_barnes;129771]Very good. I didn't know that. I just always started an entirely new sieve. That'll become necessary as we find some more primes for n<100K and you're able to remove those k's from the file.

Gary[/quote]
Well, remember, when sr2sieve uses the checkpoint.txt file, it essentially starts a new range when it's restarted--the only difference is that it includes the entire range, and all the factors already found, in the numbers it gives for factors found and % done, etc. :smile:

 gd_barnes 2008-03-26 08:46

My home dual-core Athlon will be done with its range for NPLB sieving on Thursday morning and I'll put its 2 cores on this.

Just to make the ranges nice and uneven, I'll reserve P=70G-125G. And to keep things complicated, maybe I'll split it between the 2 cores as 70G-97.45G and 97.45G-125G. :smile:

Thanks KriZp for chipping in with a good-sized range! This is a fun and important base. It's the lowest reasonably doable base that is or has not being done by other projects, it has a good # of k's remaining for a team drive, and it isn't too difficult to find primes for like base 5 and base 19 are.

Edit: Anon, we may as well include all k's in the team drive for n>100K. There has been little interest in individiual-k reservations for n<100K. I'm going to have to hassle with testing the current 3 individual k's that are not in the team drive for n<100K for n=60K-100K before we begin n>100K and I'd rather not mess with doing that in the future. So you don't need to fool around with splitting out the individual k's for n>100K when posting files for LLRing or PRPing or PFGWing or whatever people want to use. lol

Gary

 KriZp 2008-03-26 10:17

20-70 complete
reserving 125-200

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