[Perl 6] Prime numbers in closures.

sub prime {
    my $n = 1;
    my $out;

    sub {
        loop {
            $n++;
            my $is-prime = True;

            loop (my $i = 2; $i <= $n.sqrt; $i++) {
                if $n mod $i == 0 {
                    $is-prime = False;
                    last;
                }
            }

            if $is-prime {
                $out = $n;
                last;
            }
        }

        $out;
    }
}

my $p = prime();

my @arr = (2, 3, 5, 7, 11, 13, 17, 19, 23);

loop (my $i = 0; $i < @arr.elems; $i++) {
    $p() == @arr[$i] or die "Wrong value";
}