证明素数
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![证明素数](/uploads/image/z/5322585-57-5.jpg?t=%E8%AF%81%E6%98%8E%E7%B4%A0%E6%95%B0)
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证明素数
证明素数
证明素数
Suppose p is not a prime, then there exists two integers x, y >1, such that p=xy.
take a=x, b=y, we find that
p|ab is true, but p|a and p|b are not.