Atkin Sieves

[Script Coder]

I am trying to write a sieve of Atkin and came across the following articles, each saying different things.

http://programmingpraxis.com/2010/02/12/sieve-of-atkin/
http://en.wikipedia.org/wiki/Sieve_of_Atkin

My Question: Which is correct or explain the sieve in lay man's terms