Divisor 14969

Prime Number:
Yes!
Divisibility test:
The "MoJo Test"
Test Discovered by:
Matt Parker
Date:
11/11/2024

The "MoJo Test" for Divisibility by 14969

To determine if any number is divisible by 14969, apply the "MoJo Test":

  1. If your number ("X") has 8 digits or more, separate the last (smallest) 7 digits from the rest. This makes two smaller numbers, call them Left and Right (note: don't add in trailing zeros to L). If there are fewer than 8 digits, L = 0 and therefore R = X.
  2. Multiply L by 708 and add to R.
  3. Take that result and cross off its final digit (units). Take this new number and add 1497 times the digit you just crossed off. Call this final result "Y".
  4. Y will be much smaller than X, but we have preserved divisibility by 14969. That is, your original number is divisible by 14969 if (and only if) Y is. Now that it's much smaller, with basic knowledge of your 14969-times tables, it should be easy to visually see if Y is divisible by 14969. If the Y is still much larger than 14969, the above process can be repeated until it does reduce to within small multiples of 14969.

Easy!