<mark.underwood@...> wrote:>

Oops, how did I get this muddled? Too many beers when I wrote the

>

> Robert, k^n-k^(n-1) has of course factors of k so I assume you did a

> typo somewhere?

>

> Mark

>

response most probably. I meant to say:

k^p-(k-1)^p, where p is prime

Regards

Robert Smith