为什么1不是质数也不是合数

页面:/news/view-3335384/ | 耗时:0.1432 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=3335384 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3335384 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3335384 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1084249,1054460,1098219,1067241,1077984,1052105,1086608,1069253,1065917,1086116,1062774,1082992,1129711,1083971,997640,1073772,1075635,1080695,1062999,1074820,1078076,1064663,1052311,1071003,1088431,3226252,983962,1068088,1064345,1077348) ORDER BY field (ArticleID,1084249,1054460,1098219,1067241,1077984,1052105,1086608,1069253,1065917,1086116,1062774,1082992,1129711,1083971,997640,1073772,1075635,1080695,1062999,1074820,1078076,1064663,1052311,1071003,1088431,3226252,983962,1068088,1064345,1077348)