From: "Michael Kleber"
Subject: Re: [math-fun] Car Talk and prime numbers
Heh: when was the last time someone responded to one of NJAS's questions by saying the equivalent of "See A096237"?
We (math-fun) discussed this in Feb-Mar 2003, eventually calling them "deletable primes," terminology which I think was preexisting. There seem to be infinitely many of them.
At the time, we came across one surprising observation, which (in the way of the web) is still sitting here: http://people.brandeis.edu/~kleber/temp/deletable.html
""" Question: Why do prime bases (in red) seem to have many fewer deletable primes than composite bases? """ A much simpler, in fact trivial, question is: Why do odd bases seem to have many fewer deletable primes than even ones? Then I'd posit that the real question is commuted to: Do prime bases have significantly fewer deletable primes than composite odd bases? Phil () ASCII ribbon campaign () Hopeless ribbon campaign /\ against HTML mail /\ against gratuitous bloodshed [stolen with permission from Daniel B. Cristofani] __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com