%d unreliable, use %.0f

Thanks to Sam Henriksson.
See: http://stackoverflow.com/questions/1133639/how-can-i-print-a-huge-number-in-lua-without-using-scientific-notation
and
http://stackoverflow.com/questions/1133639/how-can-i-print-a-huge-number-in-lua-without-using-scientific-notation