什么数既不是质数也不是合数

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select * from tbl_Articles WHERE ArticleID=944764 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=944764 LIMIT 0,1
select * from tbl_Articles_sphinx where id=944764 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1119560,1053786,2805596,1086262,1075600,1049548,1063117,1057545,1067233,1098597,1116305,1056586,1059368,1092886,1125632,1102438,1080695,1069505,1089052,1052683,1071701,1083421,1089008,1090196,1079437,1074532,2391262,1064061,1069027,156284) ORDER BY field (ArticleID,1119560,1053786,2805596,1086262,1075600,1049548,1063117,1057545,1067233,1098597,1116305,1056586,1059368,1092886,1125632,1102438,1080695,1069505,1089052,1052683,1071701,1083421,1089008,1090196,1079437,1074532,2391262,1064061,1069027,156284)