Divisor 15976

To determine if any number is divisible by 15976, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 8 and 1997 - then it is divisible by 15976.

The following tests must pass:

• Test if a number is divisible by 8
• The "Robert Wilson Test" for Divisibility by 1997

Easy!