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2007能分成两个质数的和吗
更新时间: 2020-07-07 00:00:00  

因为质数除以2是偶数外,其它都是奇数而2007只能是1个偶数与1个奇数的和如果都为质数,那偶数只能为2,但2007减2等于2005却不是质数,因2005可被5整除。

质数又称素数。一个大于1的自然数,除了1和它自身外,不能被其他自然数整除的数叫做质数;否则称为合数。

关键词: 分成 质数

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