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本文章来自我的个人网站，如感兴趣，欢迎访问我的个人网站：http://www.qingshuimonk.com/ A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99. F

2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest positive number that is evenly divisible by all of the numbers from 1 t

本文章来自我的个人网站，如感兴趣，欢迎访问我的个人网站：http://www.qingshuimonk.com/ 今天终于搞完了PE的第十题，说起来这道题做了得有小半个月了。 算法类似于PE的第十题，还是用之前的质数去除，以此来判断是否是质数，所以代码就在第七题的基础上稍稍改动一下就可以了。 unsigned long PrimeNum[200000], n, Tot

本文章来自我的个人网站，如感兴趣，欢迎访问我的个人网站：http://www.qingshuimonk.com/ By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13. What is the 10001st prime nu