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Old 2009-12-05, 07:29   #1
10metreh
 
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Nov 2008

2·33·43 Posts
Default Team sieve #16: c161 from 4788:2483

Postprocessing will be done by fivemack

10/12: reservations closed

12/12: Linear algebra in progress

Poly:
Code:
n: 22315086009543699881696673140311700365075401903410041991888847307663799610560235574994125636703013521384678857814894314475474921423859163748271799984152025524899
# norm 1.050714e-15 alpha -7.337146 e 1.121e-12
skew: 25520528.70
c0:  31410679515197091100341643412427401243420
c1:  4180601981543089138092261003493340
c2: -2347505003114131780984812301
c3: -51235139041477161474
c4:  3624790086036
c5:  7560
Y0: -19679511428703587012905042402449
Y1:  492226961856379171
rlim: 50000000
alim: 50000000
lpbr: 30
lpba: 30
mfbr: 60
mfba: 60
rlambda: 2.6
alambda: 2.6
Use siever 14e, sieve 10M-70M algebraic for a bit over 100 million relations.

Command line:
Code:
gnfs-lasieve4I14e -a 4788.poly -o <output_file_name> -f <start_of_range> -c <length_of_range>
where 4788.poly is the poly file above.

Reservations:
Code:
  Range    Who
* 10M-20M  bsquared (done, 17695522 relations)
* 20M-30M  fivemack (done, 18332263 relations)
* 30M-40M  fivemack (done, 18623289 relations)
* 40M-45M  jrk (done, 9387623 relations)
* 45M-46M  Andi47 (done, 1871463 relations)
* 46M-56M  bsquared (done, 18384381 relations)
* 56M-57M  Greebley (done, 1641886 relations)
* 57M-60M  bsquared (done, 5023171 relations)
* 60M-62M  bsquared (done, 3426203 relations)
* 62M-65M  bsquared (done, 5102730 relations)
* 65M-70M  bsquared (done, 8325843 relations)
Total relations received: 107814368

Upload using ftp to fivemack.dyndns.org directory 4788.2483

Last fiddled with by 10metreh on 2009-12-12 at 15:58
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Old 2009-12-05, 07:43   #2
jrk
 
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I will take 40M-45M.
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Old 2009-12-05, 08:17   #3
Raman
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"Mr. Tuch"
Dec 2007
Chennai, India

23518 Posts
Default 2,1778L

Sorry to be off topic, but,
I am just setting up the parameters for 2,1778L with difficulty 230 when I encountered up this job of similar difficulty levels! 230*0.7 = 161.
230 SNFS difficulty = 161 GNFS difficulty.
Here is my polynomial file for 2,1778L that I just now set up:

Code:
n: 187456795062290175781588001552911615336516481836838901307910624762737156478204777835354105902206650861355396494419638960993048427307433062550898806001787475198429902286327892727708624452163107713035095622371850541
Y1: 9223372036854775808
Y0: -170141183460469231731687303715884105729
c6: 1
c5: 2
c4: -10
c3: -20
c2: 16
c1: 32
c0: 8
skew: 2.828427125
type: snfs
rlim: 60000000
alim: 60000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.6
alambda: 2.6
I am right now doing some test sieving upon this number, but comparing up with your parameters, I realized that there are some differences:
1) I used up rlim = alim = 60M, but you use rlim = alim = 50M.
2) I am thinking up of starting to sieve up from q = 20M, but bsquared has started up from q = 10M onwards.
3) You sieve up the algebraic side only? I think of sieving up the rational side as well.
4) You are using up the lattice siever 4I14e, but I use up 4I15e, is it OK?
5) Finally, notice that I use up only 29 bit large primes, but you use up 30 bit large primes. 29 bit large primes will make up the filtering and then the linear algebra stages much easier, right?
Considering that things, which is optimal?

Last fiddled with by Raman on 2009-12-05 at 08:36
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Old 2009-12-05, 09:39   #4
smh
 
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"Sander"
Oct 2002
52.345322,5.52471

29·41 Posts
Default

Quote:
Originally Posted by Raman View Post
1) I used up rlim = alim = 60M, but you use rlim = alim = 50M.
2) I am thinking up of starting to sieve up from q = 20M, but bsquared has started up from q = 10M onwards.
3) You sieve up the algebraic side only? I think of sieving up the rational side as well.
4) You are using up the lattice siever 4I14e, but I use up 4I15e, is it OK?
5) Finally, notice that I use up only 29 bit large primes, but you use up 30 bit large primes. 29 bit large primes will make up the filtering and then the linear algebra stages much easier, right?
Considering that things, which is optimal?
Same answer to all your questions. Do some test sieving!

Last fiddled with by smh on 2009-12-05 at 09:39
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Old 2009-12-05, 11:47   #5
fivemack
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Feb 2006
Cambridge, England

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I'll do the post-processing
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Old 2009-12-05, 12:49   #6
Andi47
 
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Oct 2004
Austria

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reserving 45M-46M
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Old 2009-12-05, 13:41   #7
Raman
Noodles
 
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"Mr. Tuch"
Dec 2007
Chennai, India

3·419 Posts
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It is a very nice race!
Let's see up who finishes off the factoring of number with the same difficulty at first.
I have run up 2,1778L on upto 17 dual core systems today.

But, apologize about me up that I cannot contribute up to this project at all. I cannot send up several GB of data of relations by using the FTP server connections at all.

Last fiddled with by Raman on 2009-12-05 at 13:45
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Old 2009-12-06, 05:14   #8
bsquared
 
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Feb 2007

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10-20 is nearly done. I'll take 46M-56M.
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Old 2009-12-06, 15:57   #9
bsquared
 
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Feb 2007

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10M-20M done: 17695522 relations, 1.9Msec on Xeon 5160 @ 3GHz
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Old 2009-12-06, 22:38   #10
fivemack
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Cambridge, England

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please upload to ftp fivemack.dyndns.org directory 4788.2483
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Old 2009-12-07, 15:25   #11
Greebley
 
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May 2009
Dedham Massachusetts USA

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Reserving 56-57M
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