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Date: Tue, 18 Oct 2011 02:13:22 +0400
From: Solar Designer <>
Subject: Re: filter performances

On Mon, Oct 17, 2011 at 05:01:31AM +0400, Solar Designer wrote:
> appears to be 3025989069143040 combinations, which is roughly 45% of
> the original total.  I computed it with the attached comb.c program,
> which I had tested with smaller settings (comparing its output vs.
> actual results).

Now that I know this number, I was able to find two more instances of it
on the web, computed using different approaches:

Most other numbers from the tables I put at:

are not found with Google's web search - in particular, it appears
that no research had been done on keyspace reduction with "at least 2
characters of a class" requirements.  This is a bit surprising.


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