Talk:Dihedral prime

I've just removed the following:

"In binary, all primes are dihedral."

I've no idea where that claim came from. First few counterexamples:

2 → 10 → 01
19 → 10011 → 11001 → 25
59 → 111011 → 110111 → 55
79 → 1001111 → 1111001 → 121

-- Smjg 17:19, 3 March 2007 (UTC)[reply]

You're absolutely right. At face value, it was a false statement. It probably came from my study of palindromic primes in binary and I probably forgot the word "palindromic" when I put it in here (I forget lots of things these days). Well, that's the beauty of talking about actual numbers: wrong statements can be identified with ease. PrimeFan 23:12, 3 March 2007 (UTC)[reply]

Hexadecimal

I saw a comment in the article source "TO DO: find or disprove hex# dihedral primes with 3 and E". E3 hexadecimal = 227 decimal is itself prime. —David Eppstein 17:53, 5 March 2007 (UTC)[reply]