Divisor 15911

To determine if any number is divisible by 15911, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 2273 - then it is divisible by 15911.

The following tests must pass:

• Test if a number is divisible by 7
• The "Zoey Test" for Divisibility by 2273

Easy!