Quote Originally Posted by Bright-Flower View Post
Your teacher may not have understood it properly or maybe it was just a simplified version of the subject, but regardless of what you learned in school, 1 is not considered a prime number.

For the first item it's been too long since I ran that raid and paid attention to the text so I don't recall exactly what's said.
The ability is called indivisible, just like how the ability when he reduces your HP is subtract and when he wants you to be a multiple of a number (or a factor) is multiply.

The actual text tells you "calculate values to primes"