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The 1st paragraph under sieve imrovements is very unclear. I assume some of these restrictions come about because of the value of N mod 20 etc? This should be explained. This paragraph needs to be expanded with a better step-by-step explanation. —Preceding unsigned comment added by 210.84.56.174 (talk) 02:52, 21 November 2007 (UTC)
The whole article is unclear... 24.147.47.6 (talk) 10:55, 6 September 2008 (UTC)
