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一、利用被2、3、5、9、11整除的数的特征。例1、证明能整除3~(11)+5~(13)的最小质数是2。
First, use the features of numbers that are divisible by 2, 3, 5, 9, and 11. Example 1. Prove that the minimum prime number that can divide 3~(11)+5~(13) is 2.