Subject: Re: Big Numbers
From: Erik Naggum <>
Date: Wed, 17 Oct 2001 23:02:34 GMT
Newsgroups: comp.lang.lisp
Message-ID: <>

* Barry Margolin <>
| There are bignum libraries available for most programming languages.  If
| I had an application written in language X and I needed to add the
| ability to check for Mersenne primes to it, I would simply link in that
| library rather than rewrite the whole thing in Lisp just because it has
| built-in bignum support.

  CLISP's bignum library was recently made available as C/C++ classes.  I
  have not looked at it, but there is no way to make the regular integers
  in C/C++ overflow properly and spontaneously create a new type, so you
  would have to make _some_ changes to your source code to use bignums, not
  to mention what you have to do when bignums are to be used in a call to
  some other function that expects a regular integer.  Several _disjoint_
  integer types is not a huge win as far as language features go.