Divisor 27703

To determine if any number is divisible by 27703, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 13 and 2131 - then it is divisible by 27703.

The following tests must pass:

• Test if a number is divisible by 13
• The "Gideon Jones-Davies Test" for Divisibility by 2131

Easy!