挑战所有程序员

请用一行语句不超过100个字符完成：

判断一个正整数是不是素数。不限语言。不管效率。

所有跟帖： 

• 回复：挑战所有程序员 -HavingFun2- ♂ (92 bytes) () 07/23/2009 postreply 20:29:07

• Not bad -botong- ♂ (0 bytes) () 07/24/2009 postreply 08:20:20

• The problem is: -botong- ♂ (72 bytes) () 07/24/2009 postreply 10:24:43

• perl的 -东瓜太郎- ♂ (118 bytes) () 07/24/2009 postreply 11:54:18

• cool! -botong- ♂ (0 bytes) () 07/24/2009 postreply 12:57:27

• One statement Solution in Matlab -HavingFun2- ♂ (99 bytes) () 07/26/2009 postreply 11:18:03

• Ahhhhh :) -botong- ♂ (0 bytes) () 07/26/2009 postreply 12:15:18

• how about this -dynamic- ♂ (10 bytes) () 07/26/2009 postreply 21:11:51

• Haskell 回复：One statement Solution in Matlab -火球魔法- ♂ (40 bytes) () 08/06/2009 postreply 19:03:53

• 回复：挑战所有程序员 -KingKrab- ♂ (45 bytes) () 08/13/2009 postreply 14:02:30