Divisor 15989

To determine if any number is divisible by 15989, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 59 and 271 - then it is divisible by 15989.

The following tests must pass:

• Test if a number is divisible by 59
• Test if a number is divisible by 271

Easy!