What is the greek word for prime?

There isn't a single, universally accepted Greek word that translates directly to "prime" in the mathematical sense (a number divisible only by 1 and itself). The concept of prime numbers was understood by the ancient Greeks, but they didn't have a specific term for it. They would describe a prime number using phrases like πρῶτος ἀριθμός (prôtos arithmos) which translates to "first number" or "primary number," indicating its fundamental nature in number theory. However, this is a descriptive phrase, not a dedicated term like "prime."