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Old 2008-03-25, 20:28   #1
mdettweiler
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Thumbs up Sierp. base 6 team sieve

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...)

Hi all,

Gary and I have decided to do a team sieve for all the remaining Sierpinski base 6 k's, similar to the doublecheck sieving 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.

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).

The sieve file can be downloaded here. 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 here--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
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 bugmesticky@googlemail.com (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!

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
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!

Last fiddled with by mdettweiler on 2009-10-26 at 18:28 Reason: added note about no more sieving needed
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Old 2008-03-25, 23:59   #2
mdettweiler
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Reserving 10G-20G.
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Old 2008-03-26, 00:13   #3
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reserving 20-40
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Old 2008-03-26, 00:15   #4
mdettweiler
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Quote:
Originally Posted by KriZp View Post
reserving 20-40
Thanks for helping out, and welcome to Conjectures 'R Us!
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Old 2008-03-26, 01:19   #5
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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
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Old 2008-03-26, 02:59   #6
mdettweiler
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Quote:
Originally Posted by KriZp View Post
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
Okay, great!

And while I'm at it, 10G-20G is finished.
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Old 2008-03-26, 03:06   #7
mdettweiler
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A new sieve file is now available, sieved to p=20G. You can get it here; 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.
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Old 2008-03-26, 04:56   #8
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Quote:
Originally Posted by Anonymous View Post
A new sieve file is now available, sieved to p=20G. You can get it here; 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.
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
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Old 2008-03-26, 05:10   #9
mdettweiler
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Quote:
Originally Posted by gd_barnes View Post
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
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.
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Old 2008-03-26, 08:46   #10
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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.

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

Last fiddled with by gd_barnes on 2008-03-26 at 09:02
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Old 2008-03-26, 10:17   #11
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20-70 complete
reserving 125-200
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