Divisor 15997

To determine if any number is divisible by 15997, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 17 and 941 - then it is divisible by 15997.

The following tests must pass:

• Test if a number is divisible by 17
• Test if a number is divisible by 941

Easy!