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质数中只有一个偶数,我们称之为质偶数,值为2,它在解有关质数的问题时,作用非常巧妙。下面结合几道赛题说明之。
There is only one even number in the prime number. We call it a prime number with a value of 2, which is very clever in solving the prime number problem. The following combination of several race titles to explain it.