Divisor 20003

To determine if any number is divisible by 20003, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 83 and 241 - then it is divisible by 20003.

The following tests must pass:

• Test if a number is divisible by 83
• Test if a number is divisible by 241

Easy!