Quadratic residues and composite moduli
Number Theory
Level
4
Which of the following statements are true?
(1) 73 is a quadratic residue mod 5.
(2) 73 is a quadratic residue mod 83.
(3) 73 is a quadratic residue mod 415.
(4) \( \left( \dfrac{73}{415} \right) = 1,\) where \( \left( \dfrac{a}{n} \right) \) is the Jacobi symbol.
by
Patrick Corn