From: Matthew Moss Date: 2006-09-02T06:00:24+09:00 Subject: Re: Happy Numbers (#93) > Out of interest, any mathmaticians care to enlighten me as to whether > happy numbers are in any way "useful"? As has been said, "real mathematicians" shudder that their work might be useful. In actuality, sometimes things like this aren't, and sometimes they are years later. Prime numbers never had much use until recent years, where they have become very important for encryption. Maybe happy numbers have a use... just no one knows it yet!