This is an issue with Perl, not with this module. Huge numbers get converted to floats automatically by Perl. You can't convert back, as you suggest, because you've lost accuracy:
$ perl -e 'print 10000000000000001, $/'
$ perl -e 'print 10000000000000005, $/'
$ perl -e 'print 10000000000000000, $/'
You will find that every module on CPAN that needs to deal with integers this big either (A) requires you to pass the number as a string, or (B) uses Math::BigInt
or similar, to prevent Perl from converting the integer to a float. Even notice from Math::BigInt
Scalars holding numbers may also be passed, but note that non-integer
may already have lost precision due to the conversation to float. Quot
input if you want BigInt to see all the digits:
$x = Math::BigInt->new(12345678890123456789); # bad
$x = Math::BigInt->new('12345678901234567890'); # good