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Old 2009-03-22, 20:13   #1
mdettweiler
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Default Group factorization effort

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Originally Posted by frmky View Post
I'm retiring 151416. It's stuck on a C142.

http://factorization.ath.cx/search.p...n=last&fr=&to=
Hmm...you know, this sequence, being such a large one, reminded me of an idea I've been toying with off and on ever since this project has gotten its own subforum. What does everyone think of the possibility of, say, doing a distributed effort on a big sequence such as this? A C142 could potentially produce some GNFS jobs big enough to be worth doing in a smaller group sieve project, a la 109!+1 and other such efforts.
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Old 2009-03-22, 20:51   #2
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Quote:
Originally Posted by mdettweiler View Post
Hmm...you know, this sequence, being such a large one, reminded me of an idea I've been toying with off and on ever since this project has gotten its own subforum. What does everyone think of the possibility of, say, doing a distributed effort on a big sequence such as this? A C142 could potentially produce some GNFS jobs big enough to be worth doing in a smaller group sieve project, a la 109!+1 and other such efforts.
should we elect a sequence for team effort including team gnfses?
there are several of us(at least me, 10metreh, and i think schickel) that would not be able to do a C14x on our own but would possibly like to be a major part in doing one
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Old 2009-03-22, 21:05   #3
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Originally Posted by henryzz View Post
should we elect a sequence for team effort including team gnfses?
there are several of us(at least me, 10metreh, and i think schickel) that would not be able to do a C14x on our own but would possibly like to be a major part in doing one
Well, the first one that came to mind was the aforementioned 151416--it is definitely big enough at this point that it would produce plenty of team-effort-worthy GNFSes. Though, of course, this is still somewhat arbitrary as I'm sure there are plenty of C14x+ sequences within this project's range that we could choose from.
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Old 2009-03-23, 07:12   #4
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Quote:
Originally Posted by mdettweiler View Post
Well, the first one that came to mind was the aforementioned 151416--it is definitely big enough at this point that it would produce plenty of team-effort-worthy GNFSes. Though, of course, this is still somewhat arbitrary as I'm sure there are plenty of C14x+ sequences within this project's range that we could choose from.
FWIW, 151416 is just going to keep increasing. The 2^3 * 3 * 5 driver, of which 2^3 * 3^3 * 5 is a variant, is particularly nasty in terms of sequence growth.

If we're going to look at a group effort, I would lean more towards 4788, which would be a good candidate after axn gives up on it....
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Old 2009-03-23, 08:23   #5
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FWIW, 151416 is just going to keep increasing. The 2^3 * 3 * 5 driver, of which 2^3 * 3^3 * 5 is a variant, is particularly nasty in terms of sequence growth.

If we're going to look at a group effort, I would lean more towards 4788, which would be a good candidate after axn gives up on it....
I agree, a group effort on 4788 would be good. I'll be willing to help!
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Old 2009-03-23, 08:29   #6
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Originally Posted by 10metreh View Post
I agree, a group effort on 4788 would be good. I'll be willing to help!
Well, it's a c103 right now....not very much group effort needed.....someone want to take a wack at it?
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Old 2009-03-23, 08:39   #7
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Originally Posted by schickel View Post
Well, it's a c103 right now....not very much group effort needed.....someone want to take a wack at it?
The poly search is running right now...
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Old 2009-03-23, 17:52   #8
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Originally Posted by 10metreh View Post
I agree, a group effort on 4788 would be good. I'll be willing to help!
Seconded. 4788 already has a pseudo-group-effort going on it anyway, so indeed it would make the perfect candidate for one.

(P.S.: I'll be willing to help out on it, too.)
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Old 2009-03-24, 06:53   #9
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Originally Posted by mdettweiler View Post
Seconded. 4788 already has a pseudo-group-effort going on it anyway, so indeed it would make the perfect candidate for one.

(P.S.: I'll be willing to help out on it, too.)
thirded
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Old 2009-03-25, 12:51   #10
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FWIW, I did P-1 1e10,1e16 on the c139 cofactor (166667...) of sequence 151416 step 777, but no luck.

Alex
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