素そ数すう

noun

prime number

Mathematical term for a natural number greater than 1 that has no positive divisors other than 1 and itself.

• 2は最さい小しょうの素そ数すうです。

  2 is the smallest prime number.

• この数かずが素そ数すうかどうか調しらべてください。

  Please check whether this number is a prime number.