Divisor 11993

To determine if any number is divisible by 11993, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 67 and 179 - then it is divisible by 11993.

The following tests must pass:

• Test if a number is divisible by 67
• Test if a number is divisible by 179

Easy!