mersenneforum.org Team sieve #36: c162 from 4788:i5141
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 2013-01-21, 01:42 #1 jrk     May 2008 3·5·73 Posts Team sieve #36: c162 from 4788:i5141 Code: # aq4788:5141 # sieve with gnfs-lasieve4I14e on -a side from Q=25M to 90M n: 887205201940910880791354660610517788880512334137737151840425477543967036683766158494641120546745694229868822924877909737118697675474613950106536548327853898707953 # norm 2.053e+22 alpha -7.784 e 1.310e-12 rroots 3 skew: 5051040.10 c5: 362700 c4: 6387646856661 c3: 53624339725773447374 c2: -196675516426754720128099634 c1: -434152361498392616833556546575606 c0: 649980606796839564654107169565430572545 Y1: 21238410121093243597 Y0: -18953682035996144770438879648918 rlim: 50000000 alim: 50000000 lpbr: 30 lpba: 30 mfbr: 60 mfba: 60 rlambda: 2.5 alambda: 2.5 ___________________________________________________________________ Dubslow: I've commandeered this post for organizational purposes. Code: Edh 80-90M ✓ 60-64M ✓ 58-60M ✓ 46-48M ✓ RichD 76-80M ✓ 64-70M ✓ 48-50M ✓ Dubslow 70-76M ✓ 30-36M ✓ 50-58M ✓ 38-44M 44-46M ✓ Andi_HB 29-30M ✓ jrk 25-29M ✓ 36-38M ✓ free: none Last fiddled with by Dubslow on 2013-02-03 at 00:05 Reason: updates
 2013-01-22, 17:02 #2 EdH     "Ed Hall" Dec 2009 Adirondack Mtns 368210 Posts There doesn't seem to be a great deal of interest in this project at the moment. I don't think I'd be capable of doing post-proc, but I can add some relations. I've started the collection with 88-90M, which will be finished soon, I think. How much RAM is needed for this c162?
2013-01-22, 18:49   #3
schickel

"Frank <^>"
Dec 2004
CDP Janesville

212210 Posts

Quote:
 Originally Posted by EdH There doesn't seem to be a great deal of interest in this project at the moment. I don't think I'd be capable of doing post-proc, but I can add some relations. I've started the collection with 88-90M, which will be finished soon, I think. How much RAM is needed for this c162?
I could do the post on this. RAM should be less than 2GB, but I can give you a closer estimate when I start the post on a c166 that I just now finished sieving....

2013-01-23, 03:00   #4
EdH

"Ed Hall"
Dec 2009
Adirondack Mtns

2×7×263 Posts

Quote:
 Originally Posted by schickel I could do the post on this. RAM should be less than 2GB, but I can give you a closer estimate when I start the post on a c166 that I just now finished sieving....
I might give it a test run if 2GB would be enough.

Something went amiss with one of my programs here and I have a gap in my 88M-90M region that I need to fill in. I should be able to have it (and the offending program) squared away by tomorrow. I'll run 86-88M after that. With a small turnout, I imagine this will be a lengthy factorization. We'll see if my attention span is that long...

2013-01-23, 09:15   #5
schickel

"Frank <^>"
Dec 2004
CDP Janesville

2×1,061 Posts

Quote:
 Originally Posted by EdH I might give it a test run if 2GB would be enough. Something went amiss with one of my programs here and I have a gap in my 88M-90M region that I need to fill in. I should be able to have it (and the offending program) squared away by tomorrow. I'll run 86-88M after that. With a small turnout, I imagine this will be a lengthy factorization. We'll see if my attention span is that long...
Looks like I'm barely sieved enough. My ETA (c166) was 551 hours with one thread; it's ~450 hours with 2 threads (forgot to start it with 2 threads, but it looks like I might want to move to my larger machine and run with 4 threads anyway....) Task manager shows memory use as 3,996,160K, so closer to 4GB....here's what the matrix looks like:
Code:
commencing linear algebra
matrix starts at (0, 0)
matrix is 8992231 x 8992410 (2753.9 MB) with weight 855926921 (95.18/col)
sparse part has weight 614016717 (68.28/col)
saving the first 48 matrix rows for later
matrix includes 64 packed rows
matrix is 8992183 x 8992410 (2660.2 MB) with weight 689773601 (76.71/col)
sparse part has weight 607419179 (67.55/col)
using block size 21845 for processor cache size 512 kB
commencing Lanczos iteration (2 threads)
memory use: 2213.8 MB
What's really disappointing is that, barring a lucky ECM factor, I have a c168 sitting in my factoring queue.

2013-01-23, 16:10   #6
EdH

"Ed Hall"
Dec 2009
Adirondack Mtns

2·7·263 Posts

Quote:
 Originally Posted by schickel Looks like I'm barely sieved enough. My ETA (c166) was 551 hours with one thread; it's ~450 hours with 2 threads (forgot to start it with 2 threads, but it looks like I might want to move to my larger machine and run with 4 threads anyway....) Task manager shows memory use as 3,996,160K, so closer to 4GB....here's what the matrix looks like: Code: ... What's really disappointing is that, barring a lucky ECM factor, I have a c168 sitting in my factoring queue.
Bummer! I guess I can't do it here, anyway. Unless, I can figure out openmpi... msieve has mpi code in it for the LA. I just don't know anything about implementing it. Right now I'm running other things like ECM and sieving across several machines via binaries and scripts that I wrote, that are very specific to my machines.

Good Luck on your c168...

 2013-01-23, 16:36 #7 Dubslow Basketry That Evening!     "Bunslow the Bold" Jun 2011 40
2013-01-23, 22:18   #8
EdH

"Ed Hall"
Dec 2009
Adirondack Mtns

2×7×263 Posts

Quote:
 Originally Posted by Dubslow I can do the post proc, presuming the sieving takes longer than the SNFS 221 I'm currently doing.
Thanks for the offer. At the rate rels are being compiled, it will probably be a while... Actually, if my attention doesn't wane and I can settle out some variations between machines here so they're a little more efficient, I might be able to do the sieve range in 2-3 weeks. I started high so others could grab the low end, but this sequence isn't all that interesting right now.

2013-01-23, 23:16   #9
schickel

"Frank <^>"
Dec 2004
CDP Janesville

2·1,061 Posts

Quote:
 Originally Posted by EdH Thanks for the offer. At the rate rels are being compiled, it will probably be a while... Actually, if my attention doesn't wane and I can settle out some variations between machines here so they're a little more efficient, I might be able to do the sieve range in 2-3 weeks. I started high so others could grab the low end, but this sequence isn't all that interesting right now.
If you do sputter out, post here and I'm sure one of us will pick it up; though 2-3 weeks is better than my time: 11/21-1/22 for sieving...

2013-01-23, 23:24   #10
schickel

"Frank <^>"
Dec 2004
CDP Janesville

2×1,061 Posts

Quote:
 Originally Posted by schickel My ETA (c166) was 551 hours with one thread; it's ~450 hours with 2 threads (forgot to start it with 2 threads, but it looks like I might want to move to my larger machine and run with 4 threads anyway....)
Wow, in this case AMD sure beats out Intel!
Quote:
 Originally Posted by msieve linear algebra completed 605163 of 8992410 dimensions (6.7%, ETA 116h22m)

 2013-01-24, 04:20 #11 RichD     Sep 2008 Kansas 3×5×13×17 Posts It looks like yoyo@home will run out of curves in a day or two. I'll pick up a few M Qs, say 76-80M unless someone thinks I should do a different range. I'll check back in less than 24 hours.

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