Question

3⁵²¹/8 find its remainder​

Answer 1

3^1 mod 8 = 3

3^2 mod 8 = 9 mod 8 = 1

∴ 3^521 mod 8

= 3^520 mod 8 * 3 mod 8

= (3^2)^260 mod 8 * 3

= 1 * 3

= 3