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Search took 0.08 seconds. Search: Posts Made By: bur
Forum: YAFU 2022-08-16, 06:38
Replies: 22
Views: 3,397
Posted By bur
I still have the problem of YAFU taking a lot of...

I still have the problem of YAFU taking a lot of time for poly selection. I recently did a 133 digit number that took about 2 hours for sieving and more than 1 hour for poly select. The behavior is...
Forum: CADO-NFS 2022-08-16, 05:36
Replies: 102
Views: 24,432
Posted By bur
Ok, good to know.

Ok, good to know.
Forum: CADO-NFS 2022-08-15, 12:24
Replies: 102
Views: 24,432
Posted By bur
Yes, I thought that maybe they focus more on the...

Yes, I thought that maybe they focus more on the development of the software and bleeding edge parameters than those smaller ones. Still, it would be very interesting for publication (not...
Forum: Aliquot Sequences 2022-08-14, 14:35
Replies: 493
Views: 76,649
Posted By bur
It's done, I did ECM on the successor term's C195...

It's done, I did ECM on the successor term's C195 up to 7558@43e6. Completing the 110e6 curves would take about 5 days for me, so have at it :)
Forum: NFS@Home 2022-08-14, 06:20
Replies: 110
Views: 9,510
Posted By bur
Done the AL3408 to 7557@43e6 and the lower B1s...

Done the AL3408 to 7557@43e6 and the lower B1s according to the usual number of curves. I won't continue.
Forum: NFS@Home 2022-08-12, 15:47
Replies: 110
Views: 9,510
Posted By bur
C175_3408_1723 done: p69 factor:...

C175_3408_1723 done:

p69 factor: 118597456346738411807868343802129420429965766338050836035650727238447
p107 factor:...
Forum: CADO-NFS 2022-08-11, 13:42
Replies: 102
Views: 24,432
Posted By bur
Thanks, that sounds very promising. I did a C153...

Thanks, that sounds very promising. I did a C153 with stock CADO parameters so I could compare the times.

Btw, has it ever been considered to share these findings with the CADO team or generally...
Forum: CADO-NFS 2022-08-10, 05:58
Replies: 102
Views: 24,432
Posted By bur
Have you ever posted a draft for C155? I thought...

Have you ever posted a draft for C155? I thought so, but now I can't find it. Thanks.
Forum: And now for something completely different 2022-08-09, 12:16
Replies: 172
Views: 38,216
Posted By bur
Very true, my contract was up for renewal and...

Very true, my contract was up for renewal and shot up to 36 c/kWh... A 200 W computer is now 50€/month just in electricity.

Fortunately for some reason the dedicated server I use (located in...
Forum: NFS@Home 2022-08-09, 06:32
Replies: 103
Views: 6,054
Posted By bur
Ah, thanks. Then it makes sense that increasing...

Ah, thanks. Then it makes sense that increasing lpb by 1 doubles the number of required relations.
Forum: NFS@Home 2022-08-09, 06:29
Replies: 110
Views: 9,510
Posted By bur
Interesting look into the History of Aliquots. :)...

Interesting look into the History of Aliquots. :)



Let's see what the factorization will yield, just as likely it'll hit another C170+ immediately.
Forum: Aliquot Sequences 2022-08-08, 08:22
Replies: 164
Views: 54,053
Posted By bur
If this situation requires more sieving, I'd...

If this situation requires more sieving, I'd assume we have more distinct prime factors (or ideals actually?) than relations? But then why is it called overdetermined? That to me sounds like having...
Forum: NFS@Home 2022-08-08, 06:13
Replies: 110
Views: 9,510
Posted By bur
Ok, I was also wondering who could continue on...

Ok, I was also wondering who could continue on that sequence. Doing the post processing is just a small contribution after all and I didn't want to "steal" the sequence from anyone. But then I'll...
Forum: NFS@Home 2022-08-08, 05:58
Replies: 103
Views: 6,054
Posted By bur
I see, so a lower lpb results in fewer relations...

I see, so a lower lpb results in fewer relations to be found, but they are more "useful"?

The latter would be due to there being fewer unknowns in the LA problem?
Forum: NFS@Home 2022-08-07, 07:21
Replies: 103
Views: 6,054
Posted By bur
That seems so low to me. A GNFS 160 takes about...

That seems so low to me. A GNFS 160 takes about 160M raw relations, a GFNS 165 takes about 220 M when I do it with CADO using Curtis' optimized parameters. Is this a result of using very different...
Forum: NFS@Home 2022-08-04, 10:35
Replies: 3
Views: 145
Posted By bur
Thanks, I'll give it a try.

Thanks, I'll give it a try.
Forum: NFS@Home 2022-08-04, 08:55
Replies: 110
Views: 9,510
Posted By bur
Taking C175_3408_1723 What is the protocol...

Taking C175_3408_1723

What is the protocol once factors are obtained, should I just put them into factordb? I know some people don't do that in case it results in a downdriver.
Forum: NFS@Home 2022-08-04, 07:48
Replies: 106
Views: 6,725
Posted By bur
Default TD is 90. True, target density does...

Default TD is 90.

True, target density does have an effect, albeit not very much for smaller numbers. In case of this 19M matrix the difference between 90 and 120 was around 4% lower ETA which is...
Forum: NFS@Home 2022-08-04, 07:42
Replies: 106
Views: 6,725
Posted By bur
9p8_277 is done. p71 factor: ...

9p8_277 is done.

p71 factor:
15049216317836517294600907995288190450795051840238103964985359740395657
p169 factor:...
Forum: NFS@Home 2022-08-03, 13:00
Replies: 3
Views: 145
Posted By bur
Colab for linear algebra?

GPU72 has a very easy to use script to trial factor using Colab's free Tesla T4's (16 GB RAM). I was wondering if this couldn't be used for linear algebra. I usually get about 3 hours at least once...
Forum: Proth Prime Search 2022-08-02, 06:25
Replies: 16
Views: 3,054
Posted By bur
Cool, when I saw that prime on UTM I suspected it...

Cool, when I saw that prime on UTM I suspected it came from this search ;)


19061965*2^19061965+1 is divisible by 3, but maybe the Woodall counterpart works out...
Forum: mersenne.ca 2022-07-28, 09:53
Replies: 50
Views: 2,177
Posted By bur
Is it possible to lookup where the factorization...

Is it possible to lookup where the factorization is used, e.g. which k? I never saw an entry where k wasn't factored, I'm curious.

Also, what other use is there besides factoring k?
Forum: Factoring 2022-07-28, 06:58
Replies: 64
Views: 8,553
Posted By bur
Thanks a lot guys, I was always wondering how...

Thanks a lot guys, I was always wondering how exactly the rational and algebraic polynomials were combined to yield kN.
Forum: NFS@Home 2022-07-28, 06:55
Replies: 106
Views: 6,725
Posted By bur
Regarding TD and its influence on the matrix. I...

Regarding TD and its influence on the matrix. I accidentally omitted the TD option when doing 9p8_277 so I can compare the default, I think it's 90, and TD 120.

TD default: 21001871 x 21002097...
Forum: Msieve 2022-07-27, 05:56
Replies: 10
Views: 273
Posted By bur
It has mpi support, when I messed up the command...

It has mpi support, when I messed up the command line, there was an error message by MPI saying a process died or something. So that seems to be ok.

Is it expected that all status messages from...
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