I find this problem when I use perl5 compiled under Linux. % perl -v This is perl, version 5.005_03 built for i386-linux % perl print 8473018401 % 524288 , "\n" 524287 The correct answer should be 33. Guoheng Wei _.-. Sr. Component Design Eng. '( ^{_} ( Intel Corp. `~\`-----'\ 512-314-0053 )_)---)_)Thread Next