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Forum: NFSNET Discussion 2007-04-27, 14:45
Replies: 16
Views: 2,883
Posted By Jushi
Why should it matter in which language the...

Why should it matter in which language the problem is written? Why does he care? If he's afraid of security (which he should be in any case), then let the script run on its own account. I don't...
Forum: Puzzles 2007-03-04, 13:40
Replies: 50
Views: 1,648
Posted By Jushi
Usually, "a = b mod c" means "c divides (b-a)". ...

Usually, "a = b mod c" means "c divides (b-a)". Then any two integers are equal mod 1, because 1 divides any integer.
Forum: Puzzles 2007-03-04, 11:07
Replies: 50
Views: 1,648
Posted By Jushi
So, 1 and 6 are primes then?

So, 1 and 6 are primes then?
Forum: NFSNET Discussion 2006-10-25, 08:09
Replies: 1
Views: 955
Posted By Jushi
IDLE assignments

Since about midnight today, I'm getting only "IDLE" assignments from NFSNET. Why is this, I don't think I'm doing anything wrong?
Forum: NFSNET Discussion 2006-10-18, 21:53
Replies: 90
Views: 8,136
Posted By Jushi
I guess in this case, the only solution is to run...

I guess in this case, the only solution is to run 64-bit software. If your program allocates 3GB of RAM, you are getting close to the theoretic limit of 4GB in a 32-bit program. You cannot really...
Forum: NFSNET Discussion 2006-10-18, 11:19
Replies: 90
Views: 8,136
Posted By Jushi
For people like me who never do any of this: what...

For people like me who never do any of this: what kind of size of memory and disk are we talking about?
Forum: Math 2006-10-09, 11:37
Replies: 61
Views: 4,479
Posted By Jushi
As you say, this is not really a well-defined...

As you say, this is not really a well-defined question. What do you mean with a ``closed-form function''?
Forum: Math 2006-10-07, 15:01
Replies: 61
Views: 4,479
Posted By Jushi
Reducible polynomials can only give a finite...

Reducible polynomials can only give a finite number of primes, because the factorization of the polynomial gives a factorization of the value.

example for f(x) = (x+1)(x+2):

f(1) = 2 x 3 = 6...
Forum: Hardware 2006-10-02, 11:32
Replies: 16
Views: 1,819
Posted By Jushi
A more realistic approach would be to simply...

A more realistic approach would be to simply assign different exponents to each processor, treating the machine as a large number of single-processor computers. It might take some time to finish an...
Forum: Math 2006-08-28, 09:39
Replies: 2
Views: 838
Posted By Jushi
NFS reference

Hello, does anyone of you know a good reference about the workings of the Number Field Sieve? I know more or less the mathematical background from Henri Cohen's "A course in computational algebraic...
Forum: Factoring 2006-05-22, 15:02
Replies: 1,810
Views: 130,056
Posted By Jushi
I am doing ECM work on 3,2,391- (C161) So far,...

I am doing ECM work on 3,2,391- (C161)
So far, I have done 7501 curves at 43e6 level, I will probably give up on this composite after 7771 curves.
Forum: Factoring 2006-05-16, 17:44
Replies: 1,810
Views: 130,056
Posted By Jushi
I completed the factorization of 3,2,371-: ...

I completed the factorization of 3,2,371-:

C141 = P46.P96
P46 = 6201693949100496151606268077803300535896962813 (found with ECM using B1=43e6)
P96 =...
Forum: GMP-ECM 2006-05-14, 08:56
Replies: 4
Views: 1,816
Posted By Jushi
"Optimal" parameters for ECM

I am wondering how the optimal parameters for ECM (http://www.loria.fr/~zimmerma/records/ecm/params.html) were determined. Given the B1 and B2 bounds, the Brent-Suyama polynomial, I suppose the...
Forum: Factoring 2006-05-14, 08:30
Replies: 1,810
Views: 130,056
Posted By Jushi
I completed the factorization of 3,2,365-: ...

I completed the factorization of 3,2,365-:

C132 = P47.P85
P47 = 64497950980593047906139516113956968129096869521 (found with ECM using B1=11e6)
P85 =...
Forum: Factoring 2006-05-09, 08:34
Replies: 1,810
Views: 130,056
Posted By Jushi
ECM work update

3,2,343- (C136) 650@1e6, 2440@3e6, 4590@11e6
3,2,365- (C132) 650@1e6, 2490@3e6
3,2,371- (C141) 2440@3e6, 4590@11e6
3,2,391- (C161) 650@1e6, 2440@3e6, 4112@11e6
3,2,395- (C144) 650@1e6, 2440@3e6,...
Forum: Factoring 2006-05-09, 08:22
Replies: 1,810
Views: 130,056
Posted By Jushi
I have already done 4590 curves at 11e6 on this...

I have already done 4590 curves at 11e6 on this number (apologies for not mentioning this earlier).
Forum: Hobbies 2006-05-04, 15:17
Replies: 14
Views: 1,753
Posted By Jushi
Cycling and cycling

Cycling and cycling
Forum: Linux 2006-05-02, 16:11
Replies: 3
Views: 717
Posted By Jushi
Lightbulb We actually managed to get our cluster running...

We actually managed to get our cluster running again, by installing MOSIX (op opposed to openMosix). I would have preferred "open" software (MOSIX is technically GPL, but morally it's not open), but...
Forum: Linux 2006-04-24, 21:46
Replies: 3
Views: 717
Posted By Jushi
Question Clustering suggestions needed

At our university (Ghent), we were running an openMosix (http://openmosix.sourceforge.net/) cluster with Gentoo Linux (http://www.gentoo.org/). Our hardware setup is one dedicated server + 33...
Forum: Factoring 2006-04-16, 09:47
Replies: 1,810
Views: 130,056
Posted By Jushi
Update

3,2,343- (C136) 650@1e6, 2440@3e6
3,2,365- (C132) 650@1e6, 11@3e6
3,2,371- (C141) 2440@3e6
3,2,391- (C161) 650@1e6, 1960@3e6
3,2,395- (C144) 650@1e6, 2212@3e6

No factors yet :no:
Forum: Factoring 2006-04-15, 19:42
Replies: 29
Views: 3,530
Posted By Jushi
Well, ecm finds the 12-digit factor of 2^607+1 in...

Well, ecm finds the 12-digit factor of 2^607+1 in a matter of seconds, while you say your algorithm takes about an hour. I know which algorithm I prefer...
Forum: Factoring 2006-04-15, 19:30
Replies: 29
Views: 3,530
Posted By Jushi
One year, are you serious?!? Please tell me this...

One year, are you serious?!? Please tell me this is just a late April Fool's joke.
Forum: Factoring 2006-04-14, 16:12
Replies: 1,810
Views: 130,056
Posted By Jushi
I've done some more curves (these include the...

I've done some more curves (these include the ones mentioned in my previous post)

3,2,343- (C136) 650@1e6, 2440@3e6
3,2,371- (C141) 2440@3e6
3,2,391- (C161) 650@1e6, 637@3e6
3,2,395- (C144)...
Forum: Factoring 2006-04-13, 09:19
Replies: 1,810
Views: 130,056
Posted By Jushi
Some ECM work:

Some ECM work (format: [#curves]@[B1 bound], other parameters are the ecm default)

3,2,343- (C136) 650@1e6, 40@3e6
3,2,371- (C141) 2440@3e6
3,2,391- (C161) 345@1e6
Forum: Factoring 2006-04-11, 20:00
Replies: 1,810
Views: 130,056
Posted By Jushi
Bob, would you mind if I also put a copy online...

Bob, would you mind if I also put a copy online at my page http://cage.ugent.be/~jdemeyer/cunningham/?
Showing results 1 to 25 of 60

 
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