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Factorial prime

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A Factorial prime is a prime of the form Factorial number ± 1.

Types

Factorial primes of the form n!-1 are of the sequence A002982 in OEIS.
Factorial primes of the form n!+1 are of the sequence A002981 in OEIS.

See also

External links

Number classes

General numbers

Special numbers

Mersenne 2ⁿ-1
Fermat 2^2ⁿ+1
Proth k•2ⁿ+1
Riesel k•2ⁿ-1
Woodall n•2ⁿ-1
Cullen n•2ⁿ+1
Double Mersenne 2^2p-1-1
Perfect 2^n-1(2ⁿ-1)
Leyland x^y ± y^x
Gen.Repunit (b^n-1)/(b-1)

Prime numbers

Mersenne
Proth
Riesel
Williams (b±1)bⁿ±1
Carol/Kynea (bⁿ±1)²-2
Multifactorial n!_j±1

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Prime