问题
填空题
For any integer n greater than 1,
denotes the product of all the integers from 1 to n, inclusive. How many prime nunbers are there between 
and 
, inclusive ？（）
答案
参考答案：720
解析：
由题意可得：
[*]=1×2×3×4×5×6=720
所以该题即为求722和726之间的质数的个数，很明显722，723，724，725，726均为合数。