Computer Chess Club Archives




Subject: Re: Non power of two hash table sizes

Author: Dann Corbit

Date: 14:07:11 02/18/02

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On February 18, 2002 at 16:56:37, Benny Antonsson wrote:

>Why must it be a prime number ?

When a composite number is chosen, factors in the number can cause a bad
[non-uniform] distribution.

See Knuth's "The Art of Computer Programming", Volume 3 'Sorting and Searching'
page 516 for a detailed explanation.

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