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From: phil@mirror.UUCP
Newsgroups: net.math
Subject: Re: Another Prime Number Question With N
Message-ID: <7100001@mirror.UUCP>
Date: Wed, 15-May-85 09:44:00 EDT
Article-I.D.: mirror.7100001
Posted: Wed May 15 09:44:00 1985
Date-Received: Sat, 18-May-85 23:46:18 EDT
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Nf-From: mirror!phil    May 15 09:44:00 1985


/**** mirror:net.math / faron!bs /  8:43 am  May 10, 1985 ****/
> 
The set is quite definitely finite. In fact it is rather small and takes
very little computer time to generate. A better way of defining it is:

The set of all primes p such that 10p + r  (r = 1,3,7,9) is also in the
set for some r.
/* ---------- */

Your set is ill-defined.  Consider the largest number P' of your
'finite' set.  P' is in the set iff some larger number is also in the 
set.