--- In primenumbers@yahoogroups.com, miltbrown@... wrote:
>
> The PRP's are the first ones past the zero value:
>
> 10^12990+11163, 12991
> 10^12991+11163, 12992

That is indeed a fairly witty coincidence. Perhaps someone would like
to work out quite how unexpected. I am unsatisfied with my
back-of-a-fag-packet calculations, so I won't post them here, but I do
think they tell me that it's not to be expected very often.

For what range of values of n have you calculated the first prime
after 10^n, Milton? I know you collected a lot of such values in the
past, and I tried to encourage you to be as systematic as possible
about such hunts. If you have completed a large contiguous range of n
values, then it's worth having those primes tabulated for quick and
easy access by others. If there are gaps that you have, I'm sure that
people will be willing to help you fill them in.

Phil