If you have an example, I would be interested in seeing it. I've been playing around with How do I convert between decimal and binary? to help this person but keep running into the 32-bit limitation also. I tried modifying the example by vroom to no avail. Note that where vroom used "B32" I changed it to "B64". There may be a way to finesse it into working but I haven't lucked into it yet.

print dec2bin(2**31);

sub dec2bin {
   my $str = unpack("B64", pack("N", shift));
   $str =~ s/^0+(?=\d)//;   # otherwise you'll get leading zeros
   return $str;
}
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This correctly produces

10000000000000000000000000000000
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But if you use anything larger than 2**31, you get

11111111111111111111111111111111
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@a=split??,'just lose the ego and get involved!';
for(split??,'afqtw{|~'){print $a[ord($_)-97]}