柯林斯詞典prime number (prime numbers) 1. N-COUNT In mathematics, a prime number is a whole number greater than 1 that cannot be divided exactly by any whole number except itself and the number 1, such as 17. 質(zhì)數(shù); 素數(shù) 返回 prime number劍橋詞典a number that cannot be divided by any other number except itself and the number 1 質(zhì)數(shù)，素數(shù) 2, 3, and 7 are prime numbers . 2，3和7是素數(shù)。 返回 prime number