什么既不是质数也不是合数

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select * from tbl_Articles WHERE ArticleID=139071 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=139071 LIMIT 0,1
select * from tbl_Articles_sphinx where id=139071 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1071501,1113878,1052683,1107687,1105557,1109304,1074562,1095576,1073698,1077182,1074916,1110858,986394,1087825,1065741,1073322,2295426,1108890,1074312,1102298,1048034,1095992,1062702,983962,1095223,1073437,1057674,1110554,1081847,1086312) ORDER BY field (ArticleID,1071501,1113878,1052683,1107687,1105557,1109304,1074562,1095576,1073698,1077182,1074916,1110858,986394,1087825,1065741,1073322,2295426,1108890,1074312,1102298,1048034,1095992,1062702,983962,1095223,1073437,1057674,1110554,1081847,1086312)