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- Newsgroups: sci.math
- Path: sparky!uunet!elroy.jpl.nasa.gov!ames!agate!linus!linus.mitre.org!gauss!bs
- From: bs@gauss.mitre.org (Robert D. Silverman)
- Subject: Re: Prime quadruplet records?
- Message-ID: <1992Jul28.151305.8747@linus.mitre.org>
- Sender: news@linus.mitre.org (News Service)
- Nntp-Posting-Host: gauss.mitre.org
- Organization: Research Computer Facility, MITRE Corporation, Bedford, MA
- References: <AeRJFQW00WBNI1kVwn@andrew.cmu.edu>
- Date: Tue, 28 Jul 1992 15:13:05 GMT
- Lines: 37
-
- In article <AeRJFQW00WBNI1kVwn@andrew.cmu.edu> ow0a+@andrew.cmu.edu (Oswald Wyler) writes:
- :A quadruplet of primes occurs when four out of five consecutive odd numbers
- :are prime. Except for the first two quadruplets, 3,5,7,11 and 5,7,11,13,
- :all quadruplets of primes are of the form 30n + 11, 30n + 13, 30n + 17,
- :30n + 19. It is well known that there are only finitely many prime
- :quadruplets.
-
- Where did you get your information?
-
- It is NOT well known that there are only finitely many because almost
- certainly there are infinitely many. This is based upon the prime k-tuples
- conjecture (which in turn is a special case of Schinzel's conj. which in turn
- is a special case of the Bateman-Horn conj.)
-
- Heuristically, up to N, one should expect about 1/phi(30) N/(log N)^4 such
- quadruplets.
-
- Since your assertion that there are only finitely many is false your other
- questions are a non-sequitur.
-
- :Question 1. Is the largest prime quadruplet known?
-
- Name one. I'll find another larger one very quickly.
-
- :Question 2. If not, what is the largest known prime quadruplet?
-
- Who knows? The question (IMO) is not very interesting.
-
- :Question 3. Up to which n (see above) are all prime quadruplets known?
-
- Since all primes up to 10^12 have been tabulated I believe this is the n
- you seek.
- --
- Bob Silverman
- These are my opinions and not MITRE's.
- Mitre Corporation, Bedford, MA 01730
- "You can lead a horse's ass to knowledge, but you can't make him think"
-