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Old 2006-12-15, 13:02   #12
patdumpsite
 
Dec 2003
Albany, NY

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Has the OPN conjecture been settled?

I came across the following:

http://arxiv.org/PS_cache/hep-th/pdf/0401/0401052.pdf

This paper claims to have settled the nonexistence in 2004, was there a problem found within this publication?

I have read nothing about it anywhere but in this paper, but if this was published two years ago, I would have thought that most people would have heard about it by now, which is why I am asking if there was a problem.

I am just curous if anyone knows what's going on.
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Old 2006-12-18, 14:33   #13
patdumpsite
 
Dec 2003
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I did more searching and I came across this thread at sci.math.

So I guess people do not seem to believe the proof is correct.
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Old 2008-10-23, 12:11   #14
Pascal Ochem
 
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Apr 2006

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wblipp cites an old paper (1957) for the result that the largest exponent in an OPN is at least 4.
http://oddperfect.org/against.html
Has this been improved ?
I cannot prove that the largest exponent is at least 5,
but I can obtain something like "an OPN containing no exponent strictly
greater than 4 must be greater than 10^10000".

Last fiddled with by Pascal Ochem on 2008-10-23 at 12:11
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Old 2008-10-23, 13:43   #15
Zeta-Flux
 
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May 2003

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Pascal,

There was a recent paper that, using sieve techniques, proved that for any given finite set of exponents, there is an upper bound for the first OPN having exponents only in that set (I think even ignoring the exponent on the special prime). If you can't find the paper, I can look it up later for you.
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