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Old 2011-03-24, 19:01   #67
Batalov
 
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A four-way split is looming on the horizon...
As the numbers keep growing, sooner or later a p6X * p6Y * p6Z * p6W may happen -- but most probably not in 2+/2- series that have an advantage of a more effective ECM implementation and deeper testing; for these series, even a p6X would look like an ECM miss.
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Old 2011-04-03, 13:31   #68
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Quote:
Originally Posted by frmky View Post
And 11,287- is done. ...
As Serge notes in an update to the 11- list yesterday, 11^{17^2}-1
= 11^289-1 is also done, but the factors haven't yet been reported.
Another ECMNET factorization, C204 = p62 * p142, with a report in
to Sam and Paul, but loria.fr seems to be down for the weekend. Just
to avoid any unnecessary suspense, that's
Code:
p62=55046695546239509301375603158875976783741983320572166350721391
This was a new 5th hole in Sam's March update with page 120. As
one may notice from Serge's update of the Garo Tables, 11- is now
of length six, and is perhaps another candidate for an extension fairly soon.

-Bruce
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Old 2011-11-29, 17:53   #69
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Quote:
Originally Posted by bdodson View Post
...
11^289-1 is also done, ... C204 = p62 * p142,
Code:
p62=55046695546239509301375603158875976783741983320572166350721391
...As one may notice from Serge's update of the Garo Tables, 11- is now
of length six, and is perhaps another candidate for an extension fairly soon.

-Bruce
Along the way towards an updated curve count, 11^281- C210 factors with
Code:
p62 =42056897140345980513090610629221667708001747337163664155114169
cofactor p148, found on the 8-core cluster, B1=900M. The cluster has
shown paging for larger numbers, B1=9e8, which is the local approximation
to the middle epfl runs with B1=1e9 (on 2+). So c191-c233 has gotten
(relatively) pounded, past t60, towards 2t60. For examples, the first two
holes on this 11- list, as well as the new 5th hole, are unlikely to have
small factors; with p5x's removed (to 80% or better). These three are
diff 280-287's.

The 3rd hole, C268 is from the range c250-c288, on which the pc/grid
has completed 2t55 (B1=400M or B1=600M). The 4th, at C300 is in the
current under-tested range, each one getting a new 2t55, ordered by
size, two C289's running. Two examples from October were p58 and p59,
both from C283's, with B1=600M. Under-tested.

-Bruce
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Old 2012-08-27, 13:07   #70
Jeff Gilchrist
 
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RSALS has finished 11,339-:

Code:
prp90 factor: 643810446382567117188524103323463470990370010759293381799712563863244254073580461427551183
prp144 factor: 264324357713710461902909612177604515669918586522740973726126103121758058526717788889149540436368339883627634262655027633736947692141680465595887
Attached Files
File Type: zip 11_339_minus1.zip (3.4 KB, 111 views)
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Old 2013-01-19, 19:42   #71
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NFS@Home has finished 11,301-.

Code:
prp106 factor: 3976039483499389676430116832962806242630315542305918376132402951153973900378536972807171245752233930860633
prp156 factor: 143431603274489333827632922976306375527002795502061753282652525122256521218096635020753694428605246222986451058439320718556500751743561220306419401130484819
Attached Files
File Type: zip 11m301.zip (4.3 KB, 120 views)
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Old 2016-02-11, 16:45   #72
chris2be8
 
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I think this is worth repeating here, since 11^311-1 is one of the first 5 holes in it's table.

Quote:
Originally Posted by wblipp View Post
Ryan Propper cracked #2 on the Most Wanted List with a P73, the first known factor of 11^311-1. It also starts out the 2016 year of ECM records with a whopper
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Old 2016-02-12, 02:32   #73
LaurV
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Yay! Give back RDS' permission to access the forum, make him happy for some time!

Last fiddled with by LaurV on 2016-02-12 at 02:33
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Old 2016-02-12, 02:41   #74
Batalov
 
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No joy there. I can readily tell you what he would say (and, sadly, it is true*):
"This is a (so called) useless factor."

__________
*check this forum way back for other people's opinions on similar factors, as well. It has nothing to do with the size of the factor, only with the result on the ETA for factoring this particular number. The change in ETA is almost zero.
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Old 2016-02-13, 17:03   #75
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Slightly more significantly, (11^311-1)/10 was the first hole with no known factors. So the factor was at least worth a mention.

Chris
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Old 2016-08-01, 06:38   #76
frmky
 
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11^283-1 is done.

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Old 2016-09-05, 16:25   #77
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Quote:
Originally Posted by frmky View Post
11^283-1 is done.

Uhm, that was
Code:
6366 
11, 283- c268 
2163935546312057591396633973695472429573850925562437339328089208815965709802705713361030484808230504878101465442961303
.p150 NFS@Home snfs
Looks like p118? Way large, for sure. -Bruce
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