Divisor 3891

To determine if any number is divisible by 3891, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 1297 - then it is divisible by 3891.

The following tests must pass:

• Test if a number is divisible by 3
• The "Marius D'jaed'r Test" for Divisibility by 1297

Easy!