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- Path: sparky!uunet!wupost!sdd.hp.com!usc!chaph.usc.edu!news
- From: rmurphy@aludra.usc.edu (Bob Murphy)
- Newsgroups: sci.math
- Subject: Re: u(v^n)w prime puzzle
- Date: 18 Aug 1992 17:55:30 -0700
- Organization: University of Southern California, Los Angeles, CA
- Lines: 27
- Message-ID: <l93702INNaq9@aludra.usc.edu>
- References: <1992Aug18.030646.29851@usenet.ins.cwru.edu> <1992Aug18.171532.14274@wri.com>
- NNTP-Posting-Host: aludra.usc.edu
-
- In article <1992Aug18.171532.14274@wri.com> roach@bikini.wri.com (Kelly Roach) writes:
- > Prove or disprove: There are three non-empty
- > strings of digits u,v,w such that all the
- > numbers in
- > L = {u(v^n)w | n is a natural number}
- > = {uw, uvw, uvvw, uvvvw, uvvvvw, ...}
- > are prime numbers.
- >
- > I am definitely not looking for any solutions involving u=v="0".
-
-
-
- If there were such values of u, v, and w, then one could construct
- arbitrarily large prime numbers. Since I have often heard
- reference to "the largest known prime number", I would guess that
- there are no such values. Now if only I had a proof.
-
-
- So far I have only been able to show that if a solution exists
- then v must be a multiple of 3.
-
-
- Bob Murphy (rmurphy@aludra.usc.edu)
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