Divisor 25813

To determine if any number is divisible by 25813, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 83 and 311 - then it is divisible by 25813.

The following tests must pass:

• Test if a number is divisible by 83
• Test if a number is divisible by 311

Easy!