不可约数,简称质数,也称素数:与每一个小于自身的自然数均 既约的正整数为质数.A Prime Number Is A Positive Integer That IrreducibleWith Every Natural Number Which Less Than Itself.不可约数,简称质数,也称素数: 与每一个小于自身的自然数均 既约的正整数为质数. A Prime Number Is A Positive Integer That Irreducible With Every Natural Number Which Less Than Itself.