IsPerfectPower

[James Wanless]

[Firstly thank you to the moderator for sorting out the slight mess I made
of my recent posting attempt - hopefully this one will be better couched]
Actually, while we're on the subject of making suggestions to (lovely) GMP,
for its next 20 years...
There is a method for finding PerfectRoots, which I discovered independently
a while ago, but recently noticed is also in Cohen ACCANT Algorithm 1.7.5.
When I last looked at the GMP source, this hadn't yet been implemented, but
it's quite possible ( :) ) you're all already aware of it, and it has been
discounted for some other reason...
J