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There's also Math::Pari which can do this sort of calculation extremely fast and with huge numbers:
use strict; use Math::Pari qw(:int PARI nextprime); print "Find primes from: "; chomp(my $o = <>); print "to: "; chomp(my $e = <>); $o = PARI $o; $e = PARI $e; if ($o > $e) { ($o,$e) = ($e,$o); } my $p = nextprime($o); while ($p <= $e) { print "$p is prime\n"; $p = nextprime($p + 1); }

Update: Fixed the code so that numbers not representable as integers can be converted to PARI objects.


In reply to Re: Prime Number Finder by tall_man
in thread Prime Number Finder by munchie

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