ヤコビ記号
( 1001 9907 ) = ( 9907 1001 ) = ( 898 1001 ) = ( 2 1001 ) ( 449 1001 ) = ( 449 1001 ) = ( 1001 449 ) = ( 103 449 ) = ( 449 103 ) = ( 37 103 ) = ( 103 37 ) = ( 29 37 ) = ( 37 29 ) = ( 8 29 ) = ( 2 29 ) 3 = − 1.