有一句输出是查错时加的，请大家忽略
by Rye_Catcher @ 2018-05-02 17:24:24
@[Rye_Catcher](/space/show?uid=61382) $n+1$不一定是质数啊
by かなで @ 2018-05-02 17:25:11
楼上正解
by misinclair @ 2018-05-02 18:17:54
@[かなで](/space/show?uid=100018) 感谢，忘记费马小定理还有这个限制了
by Rye_Catcher @ 2018-05-02 22:48:34