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-   -   BOINC NFS sieving - NFS@Home (https://www.mersenneforum.org/showthread.php?t=12388)

frmky 2013-07-24 18:32

Want L3945A?

fivemack 2013-07-24 23:08

Taking 3945A: started download now, should have a matrix by the morning and will then decide which machine to run it on.

Are there any plans to do some harder sieving given the level of linear algebra capability Jason's amazing code has made available to me and WraithX ? 31-bit LP and 15e siever are fine up to C180 or so, 32-bit and 15e look OK up to SNFS280.

XYYXF 2013-07-24 23:33

С250_128_89
(2^104)^6 + 15842*(89^21)^6 = 2*3*C250

С254_127_102
(127^17)^6 + 102*(102^21)^6 = 103*C254

Both ECMed up to 21k@260M :)

WraithX 2013-07-24 23:41

Hey everyone, I have a question about how best to split up sieving work over many different clients. I'm wondering, when you push out work units to the boinc clients, how large is the range you push to each client? Do you have clients work over 1e3 (Q, is it? Or maybe special-Q?), or 10e3, or 100e3, or 1e6? In ggnfs parlance, I'm wondering what the -c value is you push out to workers? Or is this somehow variable, perhaps depending on machine capabilities?

I'm asking because I'm about to start a very large job myself, and I've created a basic web page (php) that hands out Q/range jobs to any "client" that visits that page. I'm not sure I want to manage 500e3 results files by using range=1e3, but I'd hate to run into any unforeseen difficulties by using too large of a range. BTW, what kinds of problems might I run into if I do use too large of a value for -c?

pinhodecarlos 2013-07-24 23:56

In NFS@Home for

lasieved application (14e Lattice Sieve): [B]Q range: [/B]Sieving range, indicating the total number of workunits, each one managing 16k Q values
lasievee application (15e Lattice Sieve): [B]Q range: [/B]Sieving range, indicating the total number of workunits, each one managing 4k Q values
Above (16e Lattice Sieve and 16e Lattice Sieve V5 ): Sieving range, indicating the total number of workunits, each one managing 2k Q values

Carlos

fivemack 2013-07-25 08:04

[QUOTE=fivemack;347266]Taking 3945A: started download now, should have a matrix by the morning and will then decide which machine to run it on. [/QUOTE]

Running on 48 cores, should be done Friday evening.

debrouxl 2013-07-25 16:26

XYYXF: sadly, these numbers are too hard for 14e.

XYYXF 2013-07-25 19:37

But they fit 15e...

frmky 2013-07-25 21:24

[QUOTE=XYYXF;347361]But they fit 15e...[/QUOTE]
We have plenty of targets for 15e. We need well-ecm'ed numbers for 14e, SNFS 210-250 or GNFS 150-168.

R.D. Silverman 2013-07-25 22:15

[QUOTE=frmky;347374]We have plenty of targets for 15e. We need well-ecm'ed numbers for 14e, SNFS 210-250 or GNFS 150-168.[/QUOTE]

There are many such among the Homogeneous Cunninghams.

XYYXF 2013-07-25 22:18

Then

C211_127_90
(127^15)^6 + 90*(90^21)^6 = 7*13*601*1455069078673406790157685576941687*C211

C244_129_82
276922881*(129^13)^6 + 551368*(82^21)^6 = 13*83*C244

Both ECMed up to 18k@110M.


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