Here's 58 57 characters that even does all the printing, though it needs to be run with perl -l:

sub f{@_?($_[0],f(grep$_%$_[0],@_)):()}print for f 2..pop

I used a recursive filtering approach to make it much more concise. In fact, the sub that does the work is only 39 characters.

Update: I noticed an easy way to shave a stroke (grep EXPR vs grep BLOCK), so now it's at 57. I also added code tags which I stupidly omitted.

blokhead

In reply to Re: Sieve of Eratosthenes Golf? by blokhead
in thread Sieve of Eratosthenes Golf? by Cody Pendant

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