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Forum: Factoring 2021-06-16, 09:58
Replies: 344
Views: 9,166
Posted By fivemack
ETA Friday night for the 5,-8 SNFS job - getting...

ETA Friday night for the 5,-8 SNFS job - getting quite a lot of duplications, probably even this S210 I should have run with 15e.

May I take the C158/S195, I'll use the shiniest spun polynomial.
...
Forum: Factoring 2021-06-13, 09:42
Replies: 344
Views: 9,166
Posted By fivemack
This is the polynomial I used, which I found in a...

This is the polynomial I used, which I found in a few hours with a version of msieve CPU that I found under a rock (I think an x86_64 executable running on my ARM Mac)


n:...
Forum: Factoring 2021-06-12, 15:55
Replies: 344
Views: 9,166
Posted By fivemack
Nice split

C156 from line 55 splits as


p78 factor: 208030089699658289822530838465866133665512884513204464375029444713302449264703
p78 factor:...
Forum: Factoring 2021-06-11, 22:37
Replies: 344
Views: 9,166
Posted By fivemack
x^4 - 96*x^3 + 2232*x^2 - 17280*x + 32400 x^4 -...

x^4 - 96*x^3 + 2232*x^2 - 17280*x + 32400
x^4 - 24*x^3 + 288*x^2 - 4320*x + 32400
x^4 + 192*x^3 - 5544*x^2 + 34560*x + 32400


I can't help noticing that those polynomials have increasing powers...
Forum: Factoring 2021-06-11, 07:25
Replies: 344
Views: 9,166
Posted By fivemack
May I take the C209 S210 from (5,-8) on line 88?

May I take the C209 S210 from (5,-8) on line 88?
Forum: Factoring 2021-06-11, 07:20
Replies: 344
Views: 9,166
Posted By fivemack
Started 28*36 gmp-ecm curves at B1=3e8, default...

Started 28*36 gmp-ecm curves at B1=3e8, default B2 on the C253 from [8,-8].

That's going to be an extremely difficult SNFS job, my hope for finishing that corner is that ECM breaks off a piece big...
Forum: Factoring 2021-06-11, 07:04
Replies: 344
Views: 9,166
Posted By fivemack
Line 99 done (c139 split as p54 x p85 in 3h20m...

Line 99 done (c139 split as p54 x p85 in 3h20m wall-time on 28-thread Skylake)
Forum: Factoring 2021-06-10, 19:44
Replies: 344
Views: 9,166
Posted By fivemack
Having extracted a 22-digit prime factor by 30...

Having extracted a 22-digit prime factor by 30 thread-hours of SNFS from the c157 on line 99, I'm now running ECM on the other two integers. An even wiser person might have done it the other way...
Forum: Astronomy 2021-06-10, 19:30
Replies: 42
Views: 3,303
Posted By fivemack
1/4000 f/36 through cloud, after a short drive to...

1/4000 f/36 through cloud, after a short drive to get a bit south of Cambridge where the cloud cover was less complete:

https://www.chiark.greenend.org.uk/~twomack/eclipse.jpg
Forum: Factoring 2021-06-10, 17:06
Replies: 344
Views: 9,166
Posted By fivemack
OK, line 99 I'll start with the S160. I was...

OK, line 99 I'll start with the S160. I was briefly a Magma developer in a past life (I'm not sure whether my four-descent code is still in the current version, but I spent a lovely...
Forum: Factoring 2021-06-10, 09:17
Replies: 344
Views: 9,166
Posted By fivemack
Line 56 (6,-7) complete by SNFS. Required rather...

Line 56 (6,-7) complete by SNFS. Required rather more relations than I was expecting (29.7m raw worked, 29.3m raw didn't) and about 1100 thread-hours, so three or four days on a not-very-idle...
Forum: Factoring 2021-06-07, 20:54
Replies: 344
Views: 9,166
Posted By fivemack
For the C164 (SNFS 168.6) from (2,-8), I used ...

For the C164 (SNFS 168.6) from (2,-8), I used

rlim=alim=6000000
sieve Q=4.6M-7.0M
lpbr=lpba=27
mfbr=mfba=54
alambda=rlambda=2.6
gnfs-lasieve4I14e

It might be worth using 3LPR even at this...
Forum: Factoring 2021-06-07, 07:17
Replies: 344
Views: 9,166
Posted By fivemack
Found a P45 in the C227 from (7,-8) by ECM, which...

Found a P45 in the C227 from (7,-8) by ECM, which at least makes that line just about tractable by GNFS in the medium term.

Will now wait a moment until you are confident all the GCDs are killed...
Forum: Factoring 2021-06-05, 13:18
Replies: 344
Views: 9,166
Posted By fivemack
(5,-6) finished - the C139 has a P26 by ecm

(5,-6) finished - the C139 has a P26 by ecm
Forum: Factoring 2021-06-05, 10:24
Replies: 344
Views: 9,166
Posted By fivemack
Taking the cofactors from (7,-7); initially a day...

Taking the cofactors from (7,-7); initially a day of ECM on a dozen cores
Forum: Factoring 2021-06-05, 08:42
Replies: 344
Views: 9,166
Posted By fivemack
C156 from (6,-7) completed by ECM (p27, p39) ...

C156 from (6,-7) completed by ECM (p27, p39)

Taken a P25 out of the C152 and a P30 out of the C187

PS: also two P36 out of the C187, which is complete
Forum: Factoring 2021-06-05, 08:09
Replies: 344
Views: 9,166
Posted By fivemack
I'll take the two (5,-6) ones to start with; this...

I'll take the two (5,-6) ones to start with; this is a research direction I've been interested in since my PhD in early 2000s.

Could you also send me the SNFS polynomial for (3,-7) ?

I am also...
Forum: Hardware 2021-05-20, 11:42
Replies: 849
Views: 164,638
Posted By fivemack
Asus X99-A motherboard, second-hand E5-2673v4,...

Asus X99-A motherboard, second-hand E5-2673v4, running 20 threads at one per core


[Work thread May 20 12:44] Resuming primality test of M54082397 using FMA3 FFT length 2880K, Pass1=384,...
Forum: Homework Help 2021-05-20, 08:44
Replies: 39
Views: 3,997
Posted By fivemack
How on Earth did you notice that? I suppose...

How on Earth did you notice that? I suppose 'divisible by any number in OEIS' isn't a very large computation, but I wasn't aware that you could download the list of numbers in OEIS easily.
Forum: Information & Answers 2021-05-12, 18:17
Replies: 13
Views: 409
Posted By fivemack
Keeping Win10 laptop running flat-out

I have disabled 'turn off screen' and 'sleep' in the performance control panel, which seemed the only thing I could disable.

Nonetheless my laptop iteration times go up by about a factor two after...
Forum: Lounge 2021-03-08, 10:42
Replies: 46
Views: 3,655
Posted By fivemack
I did manage to get to the summit of Kilimanjaro,...

I did manage to get to the summit of Kilimanjaro, though it was probably the most arduous thing I've ever done: there's a couple of hours gap in my memory from the middle of the ascent to the crater...
Forum: NFS@Home 2021-02-04, 15:30
Replies: 40
Views: 6,889
Posted By fivemack
6400 curves at B1=260M found no factor for L2250;...

6400 curves at B1=260M found no factor for L2250; I've queued up the job while post-processing a further 3840 curves. It looks rather low yield even for an SNFS-250 quartic, but 300MQ ought to get...
Forum: NFS@Home 2021-01-30, 11:19
Replies: 20
Views: 2,366
Posted By fivemack
L2995A done

Fri Jan 29 16:21:09 2021 p70 factor: 1766931035816663530033036837955675983886671972196464946006728364437711
Fri Jan 29 16:21:09 2021 p142 factor:...
Forum: NFS@Home 2021-01-29, 08:52
Replies: 40
Views: 6,889
Posted By fivemack
The few thousand curves found a factor, I've...

The few thousand curves found a factor, I've deleted the job and started running curves on L2250
Forum: NFS@Home 2021-01-21, 15:27
Replies: 40
Views: 6,889
Posted By fivemack
I've put L3065B (SNFS quartic, no small factor...

I've put L3065B (SNFS quartic, no small factor known) onto the 16fs queue. Not quite sure how much ECM has been done on it; it won't get to the front of the queue any time soon so I'll run a few...
Showing results 1 to 25 of 1000

 
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