Divisor 8644

To determine if any number is divisible by 8644, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 4 and 2161 - then it is divisible by 8644.

The following tests must pass:

• Test if a number is divisible by 4
• The "Michael Grace Test" for Divisibility by 2161

Easy!