Home Is Where The Wind Blows

An immortal gem by Christian Bau (12-Feb-2003)

*any* mathematician
From: "Christian Bau" 
Subject: Re: Counting primes, and why I'm pissed
Date: Wednesday, February 12, 2003 23:23

In article <3c65f87.0302121256.10cdd65d@posting.google.com>,
jstevh@msn.com (James Harris) wrote:

> With even N, 49 < N <121,
> 
> pi(N) = 
>              floor(N/2) - floor((N-4)/6) - floor((N-16)/10) + 
>              floor((N-16)/30) - floor((N-36)/14) + floor((N-22)/42)
> 
> and if you don't believe that mathematicians are cheats, ask *any*
> mathematician in the world to produce a shorter function for that
> region.

pi(N) = 
              N/2 - floor((N-4)/6) - floor((N-16)/10) + 
              floor((N-16)/30) - floor((N-36)/14) + floor((N-22)/42)

It is shorter. You are so obsessed with yourself, you post this formula 
and claim that no mathematician could improve on it, and even an average 
ten year old could do it. 
 Gem Index  Original post & context:
 christian.bau-5DA809.22234212022003@slb-newsm1.svr.pol.co.uk