11111011011

This is 2011, be modern, use binary and not the old fashioned Roman rules


Roman rules:

Ones                         I  II  III  IV  V  VI  VII  VIII  IX

Tens                         X  XX  XXX  XL  L  LX  LXX  LXXX  XC

Hundreds                   C  CC  CCC  CD  D  DC  DCC  DCCC  CM

Thousands                 M  MM  MMM  IV  V  VI  VII  VIII  IX

Ten thousands            X  XX  XXX  XL  L  LX  LXX  LXXX  

Hundred thousands      C  CC  CCC  CD  D  DC  DCC  DCCC  CM


Binary rules:

0     = 0  

1     = 1  

10     = 2  

100     = 4  

1000     = 8  

10000   = 16

100000   = 32

1000000   = 64

10000000 = 128

11111111 = 256