Divisor 5329

To determine if any number is divisible by 5329, apply this test:

1. If your number ("X") has 5 digits or more, separate the last (smallest) 4 digits from the rest. This makes two smaller numbers, call them L^eft and R^ight (note: don't add in trailing zeros to L). If there are fewer than 5 digits, L = 0 and therefore R = X.
2. Multiply L by 658 and subtract this from R.
3. Take that result and cross off its final digit (units). Take this new number and add 533 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 5329. That is, your original number is divisible by 5329 if (and only if) Y is. Now that it's much smaller, with basic knowledge of your 5329-times tables, it should be easy to visually see if Y is divisible by 5329. If the Y is still much larger than 5329, the above process can be repeated until it does reduce to within small multiples of 5329.

Easy!