Write a program which determines if a given number is prime.

The catch: No digits or arithmetical operators. This means:

1. No digits from 0 to 9, anywhere in the program, and whatever the meaning
2. No using any built-in operators for addition, subtraction, multiplication, division, exponentiation, or modulus, anywhere in the program
3. This includes symbols like + and functions like num.add()
4. All other operations are permitted
5. You may define your own functions for the forbidden operations
6. You may use symbols like - when they mean things other than the forbidden operations

Shortest code wins - any language permitted.

#Example solution

An ungolfed solution in Java can be found here.