Bug! The for loop from one call to prime can clobber the $i of a loop in progress in a parent call.

for($i=3;$i<=sqrt($n);$i+=2){
should be
for(my $i=3;$i<=sqrt($n);$i+=2){

Use use strict!

In reply to Re: Misunderstanding Recursion by ikegami
in thread Misunderstanding Recursion by Andrew_Levenson

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