0x40000000 | 1.0

e$B0J2<$N$h$&$K!"e(Bbignum e$B$He(B float
e$B$N%S%C%H1i;;$,2DG=$J$N$O8=:_$?e(B
e$B$V$s0U?^$5$l$F$$$J$$$H;W$$$^$9!#e(B

% ./ruby -ve ‘p 0x40000000 | 1.0’
ruby 1.9.0 (2008-05-08 revision 16334) [i686-linux]
1073741825