7

This number is a prime.

Single Curio View: (Seek other curios for this number)

7! + 6! - 5! + 4! - 3! + 2! - 1! and 7! - 6! + 5! - 4! + 3! - 2! + 1! are each members of a twin prime pair! [Homewood]

Submitted: 2018-04-28 17:46:48; Last Modified: 2018-04-28 17:58:07.