Linear algebra reservations, progress and results - Page 199

YuL · 2017-10-12, 13:24

Quote:

Originally Posted by YuL

Reserving C161_3613045528091_17, thanks.

Code:

Thu Oct 12 13:15:21 2017  p70 factor: 6973758502234253884181929362856224995385676641649925515421567582226967
Thu Oct 12 13:15:21 2017  p91 factor: 2615526656926701787299805440932520462192513375052362998296857110075036721543122390667728507

LA on the 4.84e6 matrix took 2.4h using 4x Dual Intel Xeon E5-2686 v4 (target density = 128).
Log attached and at https://pastebin.com/t01fTH5Z.

fivemack · 2017-10-12, 13:48

YuL: you have some pretty impressive compute resource there! Would you be able to run for ~100 wall-clock hours to deal with Lucas(1321) ?

VBCurtis · 2017-10-12, 13:53

Code:

prp89 factor: 36004488451441119651214513502118979442636734789885920973089090859209192780295366731792917
prp136 factor: 1267270686372475929419863116308088251546931487306166069492255355460668707763455774860254500940743946722371347667053477745796394829918369

349M unique 32LP relations produced an 18.3M matrix at TD 134.

log at https://pastebin.com/QzrLFYLq

c226_143_57 is 30% complete, about two more weeks.

YuL · 2017-10-12, 13:56

Quote:

Originally Posted by fivemack

YuL: you have some pretty impressive compute resource there! Would you be able to run for ~100 wall-clock hours to deal with Lucas(1321) ?

Amazon EC2, 100 hours of 4x r4.16xlarge would cost me ~480$ :-).

richs · 2017-10-12, 14:43

Reserving C192_249541_41 please.

fivemack · 2017-10-12, 15:48

Quote:

Originally Posted by YuL

Amazon EC2, 100 hours of 4x r4.16xlarge would cost me ~480$ :-).

Ah! Definitely not asking you to do that, then :)

RichD · 2017-10-13, 18:51

Taking C227_140_61 next.

RichD · 2017-10-13, 20:20

About 354 hours (power outage) to solve 19.7M matrix using -t 4, w/ TD=144.

Code:

p81 factor: 204743040471511957974607832522577158823452984876200257817529201941362845184315697
p145 factor: 2647406304735019701172167099689199866467319081702657342977655939289431878262715543870119797539665236347622085873613993044340283536212695425604817

https://pastebin.com/ULCw6fWK

richs · 2017-10-13, 21:19

Quote:

Reserving C191_22926121_31 please.

Finished quicker than I expected.

Code:

p93 factor: 914270024491921792401085778556927231150530617854161585172963998054586105241044056026056902827
p98 factor: 23790037067171663886838174425797681923684271024161057724917436107609767438289181684247267006610009

118.7 hours on 2 threads Core i3-2310M with 4 GB memory for a 6.6M matrix at TD = 130. This matrix just fit in 4GB with 98% memory usage. Log attached and condensed version (entire log too big for Pastebin) at https://pastebin.com/mYM26G1N

Factors added to Factordb.

Mini-Geek · 2017-10-15, 12:29

I'm post-processing C213_142_112 with 449159757 relations (I started it with a few relations still pending to be reported to NFS@Home). At first I tried a target_density of 120 (a standard value for me), but it failed to enter the LA step. So I tried it again without specifying a target_density and it has begun LA on 29.7 million dimensions.

Only thing is that it's estimating about 30 days on my i5-4670K to complete linear algebra. Is this to be expected, or is there something I should do to speed it up? I don't have a problem letting it run, just want to know I'm not wasting my time.

I don't think I've done a job this big before.

Log attached.

swellman · 2017-10-15, 17:39

Quote:

Originally Posted by Mini-Geek

I'm post-processing C213_142_112 with 449159757 relations (I started it with a few relations still pending to be reported to NFS@Home). At first I tried a target_density of 120 (a standard value for me), but it failed to enter the LA step. So I tried it again without specifying a target_density and it has begun LA on 29.7 million dimensions.

Only thing is that it's estimating about 30 days on my i5-4670K to complete linear algebra. Is this to be expected, or is there something I should do to speed it up? I don't have a problem letting it run, just want to know I'm not wasting my time.

I don't think I've done a job this big before.

Log attached.

If not specified, the default target_density (TD) used by msieve is 70. You may want to restart msieve with a TD=116, then 112, etc until msieve successfully enters LA. Or drop TD in increments of 10. It’s up to you but it should be a bit faster than TD=70.

That said, a SNFS 263 is never going to be a one week job on a single machine. Good luck!

2017-10-12, 13:48	#2180
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 2·3,191 Posts	YuL: you have some pretty impressive compute resource there! Would you be able to run for ~100 wall-clock hours to deal with Lucas(1321) ? Last fiddled with by fivemack on 2017-10-12 at 13:52

2017-10-12, 13:53	#2181
VBCurtis "Curtis" Feb 2005 Riverside, CA 1001001000010₂ Posts	C224_148_86 factors Code: prp89 factor: 36004488451441119651214513502118979442636734789885920973089090859209192780295366731792917 prp136 factor: 1267270686372475929419863116308088251546931487306166069492255355460668707763455774860254500940743946722371347667053477745796394829918369 349M unique 32LP relations produced an 18.3M matrix at TD 134. log at https://pastebin.com/QzrLFYLq c226_143_57 is 30% complete, about two more weeks.

2017-10-13, 20:20	#2186
RichD Sep 2008 Kansas 3276₁₀ Posts	C225_140_138 factored About 354 hours (power outage) to solve 19.7M matrix using -t 4, w/ TD=144. Code: p81 factor: 204743040471511957974607832522577158823452984876200257817529201941362845184315697 p145 factor: 2647406304735019701172167099689199866467319081702657342977655939289431878262715543870119797539665236347622085873613993044340283536212695425604817 https://pastebin.com/ULCw6fWK Last fiddled with by fivemack on 2017-10-26 at 14:28

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2017-10-12, 14:43	#2183
richs "Rich" Aug 2002 Benicia, California 1209₁₀ Posts	Reserving C192_249541_41 please.

2017-10-13, 18:51	#2185
RichD Sep 2008 Kansas 2²·3²·7·13 Posts	Taking C227_140_61 next.