Integer overflow in hexadecimal number at ...

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Hexadecimal number > 0xffffffff non-portable at ...

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#! perl
use strict;
use warnings;
use Math::BigInt;

my $n = Math::BigInt->new('0x3BFA281009296F2');
print $n->as_hex(), ' = ', $n->bstr(), "\n";

##</code><code>##

0x3bfa281009296f2 = 270113177609606898