That's a very interesting take on the Sieve. Rewritten to be golfed, it's 33 characters. 
@_?($_[0],f(grep$_%$_[0],@_)):()

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It needs to be called as f(2..$limit) vs. f($limit).

If the requirement is that the signature is f($limit), then it goes to 47 characters 
sub x{@_?($_[0],x(grep$_%$_[0],@_)):()}x 2..pop

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My wife's blog

In reply to Re^2: Sieve of Eratosthenes Golf? by dragonchild
in thread Sieve of Eratosthenes Golf? by Cody Pendant

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