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Old 2014-10-08, 20:37   #1
pinhodecarlos
 
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"Carlos Pinho"
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Default 14e batch of WU's

Lionel,

Please check

http://escatter11.fullerton.edu/nfs/...ead.php?id=571

Message:

"""""""
Looks like the 14e batch of WU's starting with GC_9_257 are all broken. None of my Linux systems have successfully run one of them. Is this something unique to the Linux app? Or maybe just my hosts? :)

I'm guessing it's the WU's. :)
http://escatter11.fullerton.edu/nfs/...?wuid=33795303

"""""""
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Old 2014-10-09, 06:29   #2
debrouxl
 
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The set of parameters for GC_9_257 is exactly the same as the set of parameters for GC_8_266, so at least, it's not a missing parameter.

Greg ?

Last fiddled with by debrouxl on 2014-10-09 at 06:29
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Old 2014-10-09, 13:17   #3
fivemack
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The value of c0 in the .poly file is -1, where it should be +1

Sieving works fine when I correct this.

Last fiddled with by fivemack on 2014-10-09 at 13:18
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Old 2014-12-13, 18:40   #4
pinhodecarlos
 
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More errors:

http://escatter11.fullerton.edu/nfs/...hp?id=576#1455

Check GC_2_802 wu's and its details.

Last fiddled with by pinhodecarlos on 2014-12-13 at 18:48
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Old 2014-12-13, 19:55   #5
Batalov
 
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c0 should be +1; it is a G. Cullen number.

Also if it is to be restarted anyway, a better poly would be with c6: 401, c0: 2 and double Y0, double skew

Last fiddled with by Batalov on 2014-12-13 at 20:08
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Old 2014-12-14, 10:05   #6
pinhodecarlos
 
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I already contacted Lionel about this issue but he didn't reply yet to me. If someone knows his mobile number please let me know by PM.
This is the second mistake we make, it is time to change strategy, I think once Paul Leyland said he could send us the poly for his numbers instead of using the current script.
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Old 2014-12-14, 18:05   #7
xilman
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Quote:
Originally Posted by Batalov View Post
Also if it is to be restarted anyway, a better poly would be with c6: 401, c0: 2 and double Y0, double skew
Have you verified that claim? Not saying you're wrong but my experiments suggest that factoring 2N is sometimes slower than factoring N, even though the algebraic coefficients are smaller.

Paul
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Old 2014-12-14, 19:42   #8
Batalov
 
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Yes
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Old 2014-12-14, 19:47   #9
xilman
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Quote:
Originally Posted by Batalov View Post
Yes
Thanks. It should definitely be used in that case.
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Old 2014-12-14, 21:12   #10
Batalov
 
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More specifically, it is a few percent better by E value... but of course that is not a definitive sign.

I've trial-sieved (not too much) -
- on the -a side, much more sieving is needed for a good answer (-a sieving yield is noisy), but basically the same; and
- on the -r side, the second poly is a couple percent better.

I don't know what side NFS @ Home is sieving on, but interestingly -a side seems to be just a tad better.
(Usually people sieve SNFS on the -r side.)
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Old 2014-12-27, 10:07   #11
pinhodecarlos
 
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Server is dried. More work is needed.
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