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 12:46:48;   Last Modified: 2018-04-28 12:58:07.
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