http://en.wikipedia.org/wiki/Arbitrary-precision_arithmetic

http://en.wikipedia.org/wiki/Floating_point

... unary numbers
... binary numbers
... modulo numbers
... arb numbers

See 2.java for examples

... fixed point numbers
... float point numbers w/ arb
    n = s * m * 2^e

... float point numbers w/ width
    6 bits: 1 for sign, 2 for m in [4...7], 3 for e in [-4...1]
    special exponent patterns: 0, inf, NaN, and the three smallest (in
    magnitude) numbers
    should be 58 and -1/1 should be 12th with pattern 0 01 100


... error in computations