合数查询
8
497878到497983的合数
497878
497879
497880
497881
497882
497883
497884
497885
497886
497887
497888
497889
497890
497891
497892
497893
497894
497895
497896
497897
497898
497900
497901
497902
497903
497904
497905
497906
497907
497908
497909
497910
497911
497912
497913
497914
497915
497916
497917
497918
497919
497920
497921
497922
497923
497924
497925
497926
497927
497928
497930
497931
497932
497933
497934
497935
497936
497937
497938
497939
497940
497941
497942
497943
497944
497945
497946
497947
497948
497949
497950
497951
497952
497953
497954
497955
497956
497958
497959
497960
497961
497962
497964
497965
497966
497967
497968
497970
497971
497972
497973
497974
497975
497976
497978
497979
497980
497981
497982
497983
合数是至少有三个正因数的自然数，奇合数构成算术级数定理（狄利克雷定理）。卡迈克尔数是绝对伪素数，满足对所有基数的费马同余。合数分解是公钥密码分析的核心问题，未被证明是否属于NP完全问题。最小合数为4，唯一偶合数为2的例外。