Divisor 15578

To determine if any number is divisible by 15578, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 2 and 7789 - then it is divisible by 15578.

The following tests must pass:

• Test if a number is divisible by 2
• The "Garrett JustGarrett Test" for Divisibility by 7789

Easy!