Factorization of special form numbers

Factorization of special form numbers
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n!±1

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1! - 1 = 0

1! + 1 = 2

2! - 1 = 1

2! + 1 = 3

3! - 1 = 5

3! + 1 = 7

4! - 1 = 23

4! + 1 = 5²

5! - 1 = 7 * 17

5! + 1 = 11²

6! - 1 = 719

6! + 1 = 7 * 103

7! - 1 = 5039

7! + 1 = 71²

8! - 1 = 23 * 1753

8! + 1 = 61 * 661

9! - 1 = 11² * 2999

9! + 1 = 19 * 71 * 269

10! - 1 = 29 * 125131

10! + 1 = 11 * 329891

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