2^859-1 sieving - Page 4

mdettweiler · 2009-05-28, 04:37

If you guys can't get fivemack's server to work and need a spot for uploads, feel free to use the Aliquot sequence server I'm running at nplb-gb1.no-ip.org. Instructions for uploading can be found in any of the team sieve threads in the Aliquot Sequences forum; just replace the respective subdirectory name with "M851".

10metreh · 2009-05-28, 06:24

Quote:

Originally Posted by mdettweiler

If you guys can't get fivemack's server to work and need a spot for uploads, feel free to use the Aliquot sequence server I'm running at nplb-gb1.no-ip.org. Instructions for uploading can be found in any of the team sieve threads in the Aliquot Sequences forum; just replace the respective subdirectory name with "M851".

How on earth are you going to do the postprocessing?

fivemack · 2009-05-28, 09:41

Quote:

Originally Posted by bsquared

Can't seem to connect there now either:

Code:

X:\buhrow\ggnfs\2-859>ftp *.dyndns.org
Connected to *.dyndns.org.
Connection closed by remote host.

* = your username

My ADSL went down at midnight; the fault has been reported ...

mdettweiler · 2009-05-28, 14:33

Quote:

Originally Posted by 10metreh

How on earth are you going to do the postprocessing?

Nah, of course I wouldn't be doing the postprocessing...providing an FTP server doesn't always entail that.

Besides, I don't think the chiark server is at fivemack's place either--correct me if I'm wrong, but I'm pretty sure he has to download them rather than having them plopped directly on one of his machines.

Actually, my nplb-gb1.no-ip.org FTP server is at a friend's place, not mine, so I don't have direct access to it, either. Everything that goes up has to come down as well.

bdodson · 2009-05-28, 15:48

Quote:

Originally Posted by fivemack

My ADSL went down at midnight; the fault has been reported ...

Suppose this isn't the best time to report another 100M relations for
12, 256+ C228? I ended up sieving 200M-260M-(a+r), 66.3M unique
from -r, 200M-250M-a done so far on the other side (so I'm working
on the last 10M-a). -Bruce

fivemack · 2009-05-28, 16:31

It's always good to hear of an enormous chunk of relations available; I'll be in the pub with chiark's sysadmin tonight so there's the dimmest fragment of hope of some progress in that direction by the middle of tomorrow.

My equipment is entirely dedicated to sieving 2-859 at the moment, but I can run about 1800kQ on that in 24 hours at home plus around another 900kQ/day at work and have abut 12000kQ left to do, so will be ready for the 'small' filtering job on 2^859-1 and the larger filtering job on 12^256+1 by the middle of next week.

*.dyndns.org does seem to be up again and I have managed to push a 35M file to it; you can't overwrite files which are there already, so each upload attempt needs to be under a different name.

fivemack · 2009-05-28, 17:25

Sysadmin successfully contacted. ftp on chiark now seems to work.

Upload quickly before the intermittent connection-hangs-forever bug happens 100 times, which took about ten days last time.

bsquared · 2009-06-01, 03:49

AR110-115 data is on its way to dyndns.org as chiark was giving me login problems again.

13494312 relations taking 12.5Msec on k8/1400.

May the bandwidth rise for these relations,
May the wind be always at msieve's back....

Good luck with the post-processing :)

antiroach · 2009-06-01, 19:13

hey fivemack, ive uploaded what ive sieved of my range. its about 0.75M

fivemack:Thanks, got it and am finishing the last piece now

fivemack · 2009-07-01, 20:38

After 31000 Core2/2.4GHz-hours-equivalent of sieving
+ 11 hours * 1 Barcelona/2.5GHz core for the linalg setup
+ 649 hours * 4 Barcelona/2.5GHz cores for linalg on

Code:

matrix is 14478333 x 14478581 (4129.3 MB) with weight 1004273913 (69.36/col)
sparse part has weight 937694692 (64.76/col)

+ 4 hours * 80% of one Barcelona/2.5GHz core * 3 attempts for sqrt, I get

Code:

2^859-1 = 7215601 * 13183242101527799620391251382520507315529510625017 * 
58609898712737781434024027899110611446341212502589792599097337 *
689446492881618336328109432708356177701201033295524648341682389467628713061286698944336488056955742457364564837248234865096219153030243215903

where the two small factors were already known and the two larger factors are new.

Matrix time on quad Barcelona continues to fit quite nicely the curve T = 1.5 hours * (matrix columns in millions)^2.3

Andi_HB · 2009-07-01, 20:51

Congratulation @ all! Good work

2009-05-28, 16:31	#39
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 6423₁₀ Posts	It's always good to hear of an enormous chunk of relations available; I'll be in the pub with chiark's sysadmin tonight so there's the dimmest fragment of hope of some progress in that direction by the middle of tomorrow. My equipment is entirely dedicated to sieving 2-859 at the moment, but I can run about 1800kQ on that in 24 hours at home plus around another 900kQ/day at work and have abut 12000kQ left to do, so will be ready for the 'small' filtering job on 2^859-1 and the larger filtering job on 12^256+1 by the middle of next week. .dyndns.org does seem to be up again and I have managed to push a 35M file to it; you can't overwrite files which are there already, so each upload attempt needs to be under a different name. Last fiddled with by fivemack on 2009-05-28 at 17:20*

2009-06-01, 19:13	#42
antiroach Jun 2003 2²×61 Posts	hey fivemack, ive uploaded what ive sieved of my range. its about 0.75M fivemack:Thanks, got it and am finishing the last piece now Last fiddled with by fivemack on 2009-06-01 at 20:20

2009-07-01, 20:38	#43
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 1917₁₆ Posts	Finished! After 31000 Core2/2.4GHz-hours-equivalent of sieving + 11 hours * 1 Barcelona/2.5GHz core for the linalg setup + 649 hours * 4 Barcelona/2.5GHz cores for linalg on Code: matrix is 14478333 x 14478581 (4129.3 MB) with weight 1004273913 (69.36/col) sparse part has weight 937694692 (64.76/col) + 4 hours * 80% of one Barcelona/2.5GHz core * 3 attempts for sqrt, I get Code: 2^859-1 = 7215601 * 13183242101527799620391251382520507315529510625017 * 58609898712737781434024027899110611446341212502589792599097337 * 689446492881618336328109432708356177701201033295524648341682389467628713061286698944336488056955742457364564837248234865096219153030243215903 where the two small factors were already known and the two larger factors are new. Matrix time on quad Barcelona continues to fit quite nicely the curve T = 1.5 hours * (matrix columns in millions)^2.3

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
NFS sieving?	Dubslow	Factoring	8	2012-09-28 06:47
Line sieving vs. lattice sieving	JHansen	NFSNET Discussion	9	2010-06-09 19:25
10^420 + 1 sieving	juno1369	Factoring	20	2010-04-28 01:11
Sieving	OmbooHankvald	Prime Sierpinski Project	4	2005-06-30 07:51
Sieving	robert44444uk	Sierpinski/Riesel Base 5	8	2005-04-02 22:30

2009-05-28, 04:37	#34
mdettweiler A Sunny Moo Aug 2007 USA (GMT-5) 14151₈ Posts	If you guys can't get fivemack's server to work and need a spot for uploads, feel free to use the Aliquot sequence server I'm running at nplb-gb1.no-ip.org. Instructions for uploading can be found in any of the team sieve threads in the Aliquot Sequences forum; just replace the respective subdirectory name with "M851".

2009-05-28, 17:25	#40
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 1917₁₆ Posts	Sysadmin successfully contacted. ftp on chiark now seems to work. Upload quickly before the intermittent connection-hangs-forever bug happens 100 times, which took about ten days last time.

2009-06-01, 03:49	#41
bsquared "Ben" Feb 2007 2²×3×293 Posts	AR110-115 data is on its way to dyndns.org as chiark was giving me login problems again. 13494312 relations taking 12.5Msec on k8/1400. May the bandwidth rise for these relations, May the wind be always at msieve's back.... Good luck with the post-processing :)

2009-07-01, 20:51	#44
Andi_HB Mar 2007 Germany 100001000₂ Posts	Congratulation @ all! Good work