You're still trying to use decimals (%d), when the parent suggested using strings (%s): 
use Math::BigInt;
my $i = Math::BigInt->new('123_456_789_000_000_000_000');
printf qq'%045s\n', $i;

__OUTPUT__
000000000000000000000000123456789000000000000

[download]

radiantmatrix
require General::Disclaimer;
s//2fde04abe76c036c9074586c1/; while(m/(.)/g){print substr(' ,JPacehklnorstu',hex($1),1)}

In reply to Re^5: Math::BigInt and Leading Zeros by radiantmatrix
in thread Math::BigInt and Leading Zeros by aplonis

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