Divisor 23965

To determine if any number is divisible by 23965, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 5 and 4793 - then it is divisible by 23965.

The following tests must pass:

• Test if a number is divisible by 5
• The "Michael Fischer Test" for Divisibility by 4793

Easy!