[seqfan] Re: Random question

T. D. Noe noe at sspectra.com
Tue Jan 6 17:30:13 CET 2009

At 10:58 AM -0500 1/6/09, Edwin Clark wrote:
>On Mon, 5 Jan 2009, David Wilson wrote:
>> This question occurred to me when I was looking at another seqfan post.
>> For integer k > 0, is it always possible to find prime p such that the
>> concatenation kp is prime?
>The sequence kp is already in OEIS:
>and characterized as "easy". I guess this is because it is so easy to find
>additional terms. In fact one can quickly find p among the first 148
>primes for all k up to 10^6. And for over 30% of k <= 10^6, p = 3 or 7
>will do. Proving there is always a suitable p is another matter!

The primes p can be found in



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