for every positive even integer n, the function h(n) is defined to be the product of all the even integers from 2 to n, inclusive, if p is the smallest prime factor of h(n)+1, the p is
between 2 to 10 between 10 to 20 between 20 to 30 between 30 to 40 greater that 40
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发表于 2011-6-20 17:37:04
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