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Old 2009-09-15, 18:10   #4
Cruelty
 
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May 2005

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There is no particular reason why any "k" is in this sieve or not, however at some point of time decision was needed to go forward rather than think which other "k" can be also included. The speed of this sieve is also a discouraging factor when it comes to making it even bigger...
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