8223

8223 = 3 x 2741.

8223 is the smallest number having exactly two odd prime factors that differ by 2 x n², for n = 37 (A190052).

8223 has the representation 8223 = 2¹³ + 31.

8223 divides 65²⁰ - 1.

Source: On-Line Encyclopedia of Integer Sequences