the positive number n is the product of three different prim
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the positive number n is the product of three different prime numbers greater than 2.If the sum of these three prime numbers is also prime,what is the smallest possible value for
答案是165 可我怎么算都是385啊。
答案是165 可我怎么算都是385啊。
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首先n是3个不同的大于2的质数之积,质数有2、3、5、7、11、13等等;
然后问的是如果这三个质数之和也为质,n最小为几?
题目就是这个,你组合下后可以发现3+5+11为质数,且乘积最小,为165
你385肯定是5X7X11算出来的.
然后问的是如果这三个质数之和也为质,n最小为几?
题目就是这个,你组合下后可以发现3+5+11为质数,且乘积最小,为165
你385肯定是5X7X11算出来的.
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