Divisor 3903

To determine if any number is divisible by 3903, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 1301 - then it is divisible by 3903.

The following tests must pass:

• Test if a number is divisible by 3
• The "Thomas Bartelmess Test" for Divisibility by 1301

Easy!