Arg ! But i need a way to do it ! Here's a nice function i found that converts from hex to dec using only one BigInt. 
#!perl
use strict;
use Math::BigInt;
 
sub HeX {
    my $n = shift;
    $n = '0' x (4 - (length($n) % 4)) . $n;
    my $m = Math::BigInt->new(0);
    while (my $o = substr($n, 0, 4, '')){
        $m = $m * 65536 + hex $o;
    } $m;
}

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I'm trying to find a way to do something similar but from dec to hex . Maybe you have an idea ?

In reply to Re^6: Big Int to hex with 5.6 by ZlR
in thread Big Int to hex with 5.6 by ZlR

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