20101227, 08:45  #1 
(loop (#_fork))
Feb 2006
Cambridge, England
7·911 Posts 
Team sieve #22: c166 from 3270:620
Sequence 3270 is the shortest sequence with a start below 10000, having grown with a long period of 2^3*3*5; it's now at 2^3*3*7.
Iteration 620 is a C166: I spent about eight CPUweeks finding the polynomial. We'd need to sieve from 15M to 60M using the 15e siever with this poly: Code:
n: 1773271754188764469178068334154046464444957274952289279955825326222321328349114330973185907243392930104294678498232714048124362163786378662540085144893974571128845721 skew: 50908204.88 Y0: 144767682063889933793321068524324 Y1: 538109518954680569 c0: 2825944577227672043009611776143415421051145 c1: 96204614071321310022916080146763798 c2: 975710455700385174343979023 c3: 1385331590129139306600 c4: 3062765784988 c5: 27888 lpbr: 30 lpba: 30 mfbr: 60 mfba: 87 rlambda: 2.6 alambda: 3.6 alim: 40000000 rlim: 40000000 Reservations: Code:
15.0M 15.5M Andi47 (done, 1680529) 15.5M 16.0M richs (15.515.9 done) 16.0M 16.5M Andi47 (done, 1672600) 16.5M 24.0M FactorEyes (done, 24963783 relations) 24.0M 24.5M Andi47 (done) 25.0M 30.0M fivemack (done, 16211446 relations) 30.0M 32.0M fivemack (done, 6366426 relations) 32.0M 40.0M FactorEyes (done, 24922498 relations) 40.0M 41.0M schickel (40.040.5 done) 41.0M 46.0M bsquared (done, 14847229 relations) 46.0M 50.0M bsquared (done, 11517802 relations) 50.0M 54.0M bsquared (done, 11130575 relations) 54.0M 56.0M bsquared (done, 5461598 relations) Upload relations via FTP to ftp://ssh.fivemack.org and put them in the 3270.620 directory. Relations so far: about 102 million. At least 75% done. As of 29 Jan 2011: please, no more large reservations. 2 Feb 2011: Postprocessing has begun. Last fiddled with by MiniGeek on 20110202 at 12:06 Reason: updating 
20101227, 09:07  #2 
Oct 2004
Austria
2·17·73 Posts 
reserving 15M15.5M
Edit2: I guess the M 1 flag would be useful for this job too? Last fiddled with by Andi47 on 20101227 at 09:15 Reason: reservation; deleted stupid question, nevermind 
20101227, 09:34  #3  
"Frank <^>"
Dec 2004
CDP Janesville
2·1,061 Posts 
Quote:
And, yes, we have been talking about more joint forum projects, so maybe this could be the first one.... Actually, it looks like it's 2^5 * 3 * 7, which isn't any better than 2^3 * 3 * 5.... Last fiddled with by schickel on 20101227 at 09:53 

20101227, 10:45  #4 
(loop (#_fork))
Feb 2006
Cambridge, England
14351_{8} Posts 
details I left out
ECM: I've done 4000 @ 3e7 and 10000 @ 1e7  two weekends on 16 threads on the Mac Pro at the office. If anyone wants to run a bit more they're welcome.
ftp directory is 3270.620 on ssh.fivemack.org M 1 is indeed useful for this job I will do the postprocessing 
20101227, 10:49  #5 
"Frank <^>"
Dec 2004
CDP Janesville
4112_{8} Posts 
I wish I had that kind of ECM power!

20101227, 11:02  #6 
Oct 2004
Austria
2482_{10} Posts 
I think this thread needs to become sticky'd.

20101227, 13:52  #7 
Sep 2009
977 Posts 
15e siever and short range of q values, so RSALS can't lend a hand in this team sieving

20101227, 17:59  #8 
"Ed Hall"
Dec 2009
Adirondack Mtns
2^{2}·883 Posts 
I thought I'd try to lend some effort, but my machines are either too limited or I'm doing something wrong. I get the following with the above poly:
Code:
$ gnfslasieve4I15e a 3270:620.poly o 3270:620.rels f 15500000 c 500000 Warning: lowering FB_bound to 15499999. Segmentation fault $ 
20101227, 18:29  #9  
Oct 2004
Austria
2×17×73 Posts 
Quote:


20101231, 10:33  #10 
Oct 2004
Austria
2482_{10} Posts 
feeling a bit lonely here.
At the current rate (I'm sieving ~80 kQ/day) we will be ready around summer 2012... 
20101231, 15:31  #11  
"Frank <^>"
Dec 2004
CDP Janesville
2×1,061 Posts 
Quote:
I'm also hoping that the New Year brings some nice deals on quadcores! 

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