Divisor 15605

To determine if any number is divisible by 15605, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 5 and 3121 - then it is divisible by 15605.

The following tests must pass:

• Test if a number is divisible by 5
• The "Ondra Hermanek Test" for Divisibility by 3121

Easy!