Divisor 15724

To determine if any number is divisible by 15724, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 4 and 3931 - then it is divisible by 15724.

The following tests must pass:

• Test if a number is divisible by 4
• The "Christ van Willegen Test" for Divisibility by 3931

Easy!