There are faster ways to decide this problem, as well. I'm no mathematician, but your algorithm is dividing by all odd factors between 3 and sqrt(x); this can be improved by dividing by all *prime* factors between 3 and sqrt(x).

Since you're already finding all these numbers, just use dynamic programming-- when you find a prime, hash it for later reference. Then in your loop just go through the keys of your hash.

In reply to Re: Re: Perl Not Releasing Memory by Anonymous Monk
in thread Perl Not Releasing Memory by rekcah

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