Divisor 28931

To determine if any number is divisible by 28931, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 4133 - then it is divisible by 28931.

The following tests must pass:

• Test if a number is divisible by 7
• The "Rick Leijssen Test" for Divisibility by 4133

Easy!