From: C Erler <erlercw@...>
Date: 2007-10-20T10:39:08+09:00
Subject: 1.9 Prime class change request

In mathn.rb, please remove the method Prime.cache and its aliases,
since it is an exposed implementation detail.  If we later switch to a
faster algorithm that doesn't use a cache, backward compatibility
issues will be avoided.

Those who want to see the cache would still be able to use hackish
methods to acheive it.