Exercise 5.22

Use the Jacobi symbol to determine ( 113 997 ) , ( 215 761 ) , ( 514 1093 ) , and ( 401 757 ) .

Answers

Proof. ( 113 997 ) = ( 997 113 ) = ( 93 113 ) = ( 113 93 ) = ( 20 93 ) = ( 2 2 93 ) ( 5 93 ) = ( 5 93 ) = ( 93 5 ) = ( 3 5 ) = ( 5 3 ) = ( 2 3 ) = 1 .

( 215 761 ) = ( 761 215 ) = ( 116 215 ) = ( 2 2 215 ) ( 29 215 ) = ( 29 215 ) = ( 215 29 ) = ( 12 29 ) = ( 2 2 29 ) ( 3 29 ) = ( 3 29 ) = ( 29 3 ) = ( 2 3 ) = 1 .

( 514 1093 ) = ( 2 1093 ) ( 257 1093 ) = ( 257 1093 ) = ( 1093 257 ) = ( 65 257 ) = ( 257 65 ) = ( 62 65 ) = ( 2 65 ) ( 31 65 ) = ( 31 65 ) = ( 65 31 ) = ( 3 31 ) = ( 31 3 ) = ( 1 3 ) = 1 .

( 401 757 ) = ( 757 401 ) = ( 356 401 ) = ( 401 89 ) = ( 45 89 ) = ( 89 45 ) = ( 44 45 ) = ( 2 2 45 ) ( 11 45 ) = ( 11 45 ) = ( 45 11 ) = ( 1 11 ) = 1 . □

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2022-07-19 00:00
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