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

Mathew 2013-01-07 20:12

[QUOTE=Mathew;323839]I would like to reserve 11411_108[/QUOTE]

Complete

[CODE]prp65 factor: 47900800801223886139201610745670452318691497498742261311799912721
prp151 factor: 1364475667022941371781835892014764310532189565871850947023815893714797869685893030409033728507638580307710172399652041261314342813476975784077453819623[/CODE]

fivemack 2013-01-09 23:10

I'm just doing the filtering on 3617523089023m19 for the third time, this time with target_density=100.

If it fails again then I will superstitiously do 'sort -t: -u -k1,1' on the .dat file to present msieve with something devoid of duplicates (30% of the relations in the file are duplicates)

I'm surprised that target_density=130 and target_density=150 both gave the same numbers in the error message 'found 79713 cycles, need 6387567'.

fivemack 2013-01-10 08:24

target_density=100 worked fine; the matrix is relatively large

Thu Jan 10 08:34:24 2013 matrix is 14183848 x 14184025 (5698.1 MB) with weight 1659511550 (117.00/col)

despite what looked like significant over-sieving, results expected Wednesday evening.

Batalov 2013-01-10 08:46

From 853_83, I observe (50% seriously, 50% not) that there seem to exist some fraction of way too smart users who submit garbage (or the same relations again and again?) in huge blocks and get free credit. Note: the blocks of meaningless relations are contiguous. It might be useful to write a lightweight poly-specific validator on the BOINC server side. The more users will get "smart", the more redundant (or simply void) the relation sets will become.

I know that it is unlikely that there's a ghost writer out there who would spoof the binary (or hack the boincclient and manager to disregard control sums). But it seems possible for the user to [SPOILER]deleted as Hollywood movies delete the actual recipe for a bomb[/SPOILER]... I will PM my thoughts about a validator.

In any case, I am sure that this is not yet a serious concern.

Batalov 2013-01-15 19:19

[I]HAI [/I]
[I]CAN HAS STDIO? [/I]
[I]VISIBLE "CAN HAS L1112?" [/I]
[I]KTHXBYE [/I]
[I]_____________[/I]

What a completely different picture!
...a 7.2M matrix and ETA 45 hours, not ~300 hrs like the recent undersieved monsters.

fivemack 2013-01-16 12:01

I'll take L1117; just (1203 GMT) started the nine-hour download.

ETA: Friday evening (matrix is 9629022 x 9629206 (2841.2 MB) with weight 826269592)

fivemack 2013-01-16 13:44

3617523089023^19-1 factored
 
1 Attachment(s)
[code]
Wed Jan 16 12:53:33 2013 prp84 factor: 557258425413806445667309985154135217521361150595029596359152854319857835915823200759
Wed Jan 16 12:53:33 2013 prp143 factor: 20199795244583513021981780712113866444867173343763106622339890390300388073800190109878675467564995471684114306237330166755975882748293540763207
[/code]

About twelve hours to download 19.2GB of .dat.gz - I had to do this twice because I had a network glitch in the middle and screwed up the resume. Three filtering attempts at eight hours each (trying densities 150, 130 and 100). 144 real-time hours on 24 CPUs for the linear algebra on

Thu Jan 10 08:34:24 2013 matrix is 14183848 x 14184025 (5698.1 MB) with weight 1659511550 (117.00/col)

Eight sqrt jobs in parallel, 6h15m each, one of them got the factor so I killed the rest.

Batalov 2013-01-18 06:36

[URL="http://factordb.com/index.php?query=lucas%281112%29"]Lucas(1112)[/URL] cofactor = p72 . p101

fivemack 2013-01-18 21:25

L1117 done
 
1 Attachment(s)
[code]
Fri Jan 18 21:02:56 2013 prp103 factor: 5265270109006540364117493740151322185266234296158288170514998448071532498087344398659233986762427993159
Fri Jan 18 21:02:56 2013 prp123 factor: 747535627193126498586684840308259038720410703671885928156444877971766437582129851274770198459817795701357498766825830490429
[/code]

Seven hours to download 13.9GB; 14 minutes to decompress it. 275 minutes to filter; 2420 minutes on 24 CPUs to run the 9629022 x 9629206 (2841.2 MB) matrix with weight 826269592 (85.81/col); 99 minutes per square root.

pinhodecarlos 2013-01-23 10:50

[QUOTE=fivemack;325162][code]
Fri Jan 18 21:02:56 2013 prp103 factor: 5265270109006540364117493740151322185266234296158288170514998448071532498087344398659233986762427993159
Fri Jan 18 21:02:56 2013 prp123 factor: 747535627193126498586684840308259038720410703671885928156444877971766437582129851274770198459817795701357498766825830490429
[/code]Seven hours to download 13.9GB; 14 minutes to decompress it. 275 minutes to filter; 2420 minutes on 24 CPUs to run the 9629022 x 9629206 (2841.2 MB) matrix with weight 826269592 (85.81/col); 99 minutes per square root.[/QUOTE]

Only missing the kWh spent. Good work!

pinhodecarlos 2013-01-30 15:55

lasieved
 
lasieved wus' needed.


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