同学们知道如何寻找质数吗?还是让蒋老师来告诉你吧.一个大于1的整数,如果除它本身和1外,没有别的因数,这个整数就叫质数.如2、3、5、7、11等都是质数.质数也称素数.质数是自然数的一部分,它也有无穷多个.不过,质数看上去要比自然数少得多.有人统计过:在1到1 000之间,有168个质数;在1 000到2 000之间,有1 35个质数;在2 000到3 000之间,有127个质数;而在3 000到 Students know how to find the prime numbers, or let Professor Jiang tell you, an integer greater than 1, if there is no other factor than this, the integer is called the prime number, as 2, 3, 5, 7 , 11, etc. are prime numbers. Prime numbers are also prime numbers. Prime numbers are part of a natural number and there are an infinite number of them. However, the prime numbers appear to be much smaller than natural numbers. Some have counted that between 1 and 1,000, there are 168 Prime numbers; there are 1 35 prime numbers between 1 000 and 2 000, 127 prime numbers between 2 000 and 3 000, and prime numbers between 3 000 and 2 000;