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-   -   Team sieve #36: c162 from 4788:i5141 (https://www.mersenneforum.org/showthread.php?t=17695)

jrk 2013-01-21 01:42

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
[/code]
___________________________________________________________________

[COLOR="Blue"]Dubslow:

I've commandeered this post for organizational purposes. :smile:

[code]
Edh 80-90M ✓
60-64M ✓
58-60M ✓
46-48M ✓
RichD 76-80M ✓
64-70M ✓
48-50M ✓
Dubslow 70-76M [STRIKE]✓[/STRIKE]
30-36M [STRIKE]✓[/STRIKE]
50-58M ✓
38-44M
44-46M ✓
Andi_HB 29-30M ✓
jrk 25-29M ✓
[U] 36-38M ✓[/U]

free: none
[/code]
[/COLOR]

EdH 2013-01-22 17:02

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?

schickel 2013-01-22 18:49

[QUOTE=EdH;325475]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?[/QUOTE]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....

EdH 2013-01-23 03:00

[QUOTE=schickel;325490]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....[/QUOTE]
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...:smile:

schickel 2013-01-23 09:15

[QUOTE=EdH;325533]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...:smile:[/QUOTE]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[/code]What's really disappointing is that, barring a lucky ECM factor, I have a c168 sitting in my factoring queue. :down:

EdH 2013-01-23 16:10

[QUOTE=schickel;325552]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]...[/code]What's really disappointing is that, barring a lucky ECM factor, I have a c168 sitting in my factoring queue. :down:[/QUOTE]Bummer! I guess I can't do it here, anyway. [I]Unless[/I], 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...

Dubslow 2013-01-23 16:36

I can do the post proc, presuming the sieving takes longer than the SNFS 221 I'm currently doing.

EdH 2013-01-23 22:18

[QUOTE=Dubslow;325570]I can do the post proc, presuming the sieving takes longer than the SNFS 221 I'm currently doing.[/QUOTE]
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.

schickel 2013-01-23 23:16

[QUOTE=EdH;325609]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.[/QUOTE]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...

schickel 2013-01-23 23:24

[QUOTE=schickel;325552]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....) [/QUOTE]Wow, in this case AMD sure beats out Intel![quote=msieve]linear algebra completed 605163 of 8992410 dimensions (6.7%, ETA 116h22m)[/quote]

RichD 2013-01-24 04:20

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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