Some Prime Nonsense
This generates a composite number "N" for the combo in this decklist.
N avoids the rules of divisibility and is intended to be humanly incalculable (generated numbers are larger than 250), to make guessing a factor as difficult as possible.
The defending player picks a factor of N, then the page checks it. Everything runs in your browser; nothing is sent anywhere. This is a JavaScript port of the original Python program.
n chosen for combo is:
n
Chosen factor