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.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|