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Old 2009-02-11, 12:20   #1
em99010pepe
 
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Default Generalized Cullen and Woodall numbers

ECMNet server available at http://malibu.gen.cam.ac.uk:8194/ hosted by Paul Leyland. Thank you.

At the current level (B1=3M), and with ecm 64 bits with 6.2.1 (with GMP 4.2.4), a curve is done on my Q6600@3GHz in ~1 min.

Feel free to move a few cores to help Paul's search. Thank you.

Carlos

Last fiddled with by em99010pepe on 2009-02-11 at 12:22
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Old 2018-10-12, 17:57   #2
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ItΒ΄s time to revive this thread.
As of today there are still 10748 composite numbers in the list, they are ranging from 169 digits up to 1083 digits.
You can find all infoΒ΄s here. (I have some problems connecting to the site, sometimes it works...but sometimes not.)


There should be an ECMnet server at 109.109.168.71:8194 which should be loaded with B1=11M (t45).



IΒ΄ll see if I have enough resources to pretest some of these numbers up to t50, if not IΒ΄ll spend some cores on ECMnet.
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Old 2018-10-12, 20:01   #3
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Originally Posted by MisterBitcoin View Post
There should be an ECMnet server at 109.109.168.71:8194 which should be loaded with B1=11M (t45).
The IP address changed. It is now 83.217.167.177:8194
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Old 2019-01-20, 10:47   #4
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My ISP has warned that the GCW website will need to be relocated some time later this year. When it has been moved I'll inform the forum.

Paul
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Old 2019-03-22, 14:58   #5
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My ISP has warned that the GCW website will need to be relocated some time later this year. When it has been moved I'll inform the forum.

Paul

Over the last few years the www.leyland.vispa.com web site has become ever more unreliable. A couple of months ago my ISP, Vispa Ltd, told me that I was half of their entire customer base for personal web sites and that support was commercially unviable. I understand that POV and am pleased that I was able to exploit that particular freeby for so long. However, all good things come to an end (other than sausages, which come to two) and the GCW page has now migrated.

Please use https://brnikat.com/nums/cullen_woodall/cw.html from now on.

Paul
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Old 2019-03-22, 22:28   #6
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Quote:
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Is there a new address for the ECMnet server?
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Old 2019-03-23, 00:15   #7
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Quote:
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Is there a new address for the ECMnet server?
The addresses are as given on the factoring page

I am running two ECMNET servers on the IP address 83.217.167.177. That which is running on port 8194 is currently loaded up with the (Generalized) Cullen and Woodall numbers, whereas that on port 8195 is loaded with the Homogeneous Cunninghams.
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Old 2019-03-25, 19:43   #8
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The link to the Cunningham Numbers page doesn't work.
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Old 2019-03-25, 20:56   #9
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The link to the Cunningham Numbers page doesn't work.
Correct.

A number of other links are broken too. I am still to decide whether fixing them is worth the effort in terms of their likely usefulness. I may well just delete them.

Some of the tables targeted by the links haven't been updated in years. Updating will take significant effort and, again, I ask whether it is worth it.
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Old 2019-03-26, 08:35   #10
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Quote:
Originally Posted by xilman View Post
Correct.

A number of other links are broken too. I am still to decide whether fixing them is worth the effort in terms of their likely usefulness. I may well just delete them.

Some of the tables targeted by the links haven't been updated in years. Updating will take significant effort and, again, I ask whether it is worth it.
I... don't think it is. There are other resources much more up to date with factors for them, such as factordb and http://myfactors.mooo.com/

Of course, every resource goes to a varying depth of n (and b choices for that matter) and can be valuable in it's own part. I myself am insterested in creating a comprehensible resource for b=2. It's in an early conceptual stage right now, though.
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