Divisor 2047

To determine if any number is divisible by 2047, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 23 and 89 - then it is divisible by 2047.

The following tests must pass:

• Test if a number is divisible by 23
• Test if a number is divisible by 89

Easy!