Divisor 25501

To determine if any number is divisible by 25501, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 3643 - then it is divisible by 25501.

The following tests must pass:

• Test if a number is divisible by 7
• The "Brian Test" for Divisibility by 3643

Easy!