Factoring database - Page 3

Syd · 2008-12-16, 13:11

Quote:

Originally Posted by henryzz

have you added looking for algebraic factorizations

Not yet, maybe later.

Quote:

Originally Posted by fivemack

You construct, using GMP and a product tree, twenty numbers

I tried it, but it takes ages to finish. I already have > 1M composite numbers with no factors known in the database, the server is way too slow.

Quote:

Originally Posted by 10metreh

P.S. How far have you factored Mersenne numbers? There is still a C78 for M277.

Everything up to C70 is factored now, I'm still trying to import the others

Syd

10metreh · 2008-12-16, 13:14

Well I've done M254 and someone's done M277 in the meantime.

All Mersennes up to M500 done.

How far have you ECM'd so far? What do you mean by low, medium and high limits? At a guess, 20, 25 and 30 digits, though I am bound to be wrong.

I see the workers are working harder now. They're in a race with me!

Syd · 2008-12-16, 14:02

Quote:

Originally Posted by 10metreh

Well I've done M254 and someone's done M277 in the meantime.

All Mersennes up to M450 done.

How far have you ECM'd so far? What do you mean by low, medium and high limits? At a guess, 20, 25 and 30 digits, though I am bound to be wrong.

low is ecm -one -c 5 -i 5000 -v 10000, medium ecm -one -c 20 -i 5000 -v 10000 and high is ecm -one -c 200 -i 5000 -v 10000.
Every composite is automatically assigned for low ecm.

Syd · 2008-12-16, 14:04

Quote:

Originally Posted by 10metreh

I see the workers are working harder now. They're in a race with me!

The workers found a factor table

10metreh · 2008-12-16, 14:29

Quote:

Originally Posted by Syd

The workers found a factor table

They didn't even know of factor tables or Alpertron's applet (which I was using)?

Mersennes done up to M550.

How much are you doing on near-Cunningham numbers (numbers of the form $a^b + c$ , $c$ small)?

I'm taking a break now. The workers can do the rest.

Syd · 2008-12-16, 15:17

Quote:

Originally Posted by 10metreh

They didn't even know of factor tables or Alpertron's applet (which I was using)?

I imported some factor tables using the workers. First the mersenne.org's "factors.cmp", now I'm doing the cunningham tables. Which one should be next?

R. Gerbicz · 2008-12-16, 15:26

Quote:

Originally Posted by Syd

I imported some factor tables using the workers. First the mersenne.org's "factors.cmp", now I'm doing the cunningham tables. Which one should be next?

http://www.asahi-net.or.jp/~KC2H-MSM/mathland/matha1/

fivemack · 2008-12-16, 16:36

http://primorial.unit82.com/tableplusone.html

http://primorial.unit82.com/tableminusone.html

http://www.mersenneforum.org/showthr...571#post144571

Syd · 2008-12-16, 17:25

Now it can display multiple numbers at once, here are some examples:

Display 2^1+1 to 2^100+1
2^x+1,1,100

Display Mersennes from 300 (to 300+100)
Mx,300

5^x-3^x+1,10000,10010

however, the number of results is limited to 100 at once.

fivemack · 2008-12-16, 18:13

Wow. That's fantastic. Basically, you have single-handedly replaced all current factorisation tables. All it needs now is a reservation engine :)

One tiny glitch: if I search for '1+x!,100,105' then click on '1+104!', the '+' doesn't get ecaped in the HTML, so it takes me to '1 104!'

Syd · 2008-12-16, 18:34

Quote:

Originally Posted by fivemack

Wow. That's fantastic. Basically, you have single-handedly replaced all current factorisation tables. All it needs now is a reservation engine :)

One tiny glitch: if I search for '1+x!,100,105' then click on '1+104!', the '+' doesn't get ecaped in the HTML, so it takes me to '1 104!'

Thank you

Fixed that one. Now i'll try to fix the bugs R. Gerbicz reported ..

2008-12-16, 13:14	#24
10metreh Nov 2008 2×3³×43 Posts	Well I've done M254 and someone's done M277 in the meantime. All Mersennes up to M500 done. How far have you ECM'd so far? What do you mean by low, medium and high limits? At a guess, 20, 25 and 30 digits, though I am bound to be wrong. I see the workers are working harder now. They're in a race with me! Last fiddled with by 10metreh on 2008-12-16 at 13:59

2008-12-16, 17:25	#31
Syd Sep 2008 Krefeld, Germany 2·5·23 Posts	Now it can display multiple numbers at once, here are some examples: Display 2^1+1 to 2^100+1 2^x+1,1,100 Display Mersennes from 300 (to 300+100) Mx,300 5^x-3^x+1,10000,10010 however, the number of results is limited to 100 at once. Last fiddled with by Syd on 2008-12-16 at 17:33 Reason: add

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2008-12-16, 16:36	#30
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 2·3,191 Posts	http://primorial.unit82.com/tableplusone.html http://primorial.unit82.com/tableminusone.html http://www.mersenneforum.org/showthr...571#post144571

2008-12-16, 18:13	#32
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 2·3,191 Posts	Wow. That's fantastic. Basically, you have single-handedly replaced all current factorisation tables. All it needs now is a reservation engine :) One tiny glitch: if I search for '1+x!,100,105' then click on '1+104!', the '+' doesn't get ecaped in the HTML, so it takes me to '1 104!'