A177502 Prime numbers p such that (p-2)! + 1 is prime.

2, 3, 5, 13, 29, 43, 79, 401, 26953, 150211, 288467, 422431

Offset: 1

Author

Artur Jasinski, May 10 2010

Keywords

• nonn
• more

Examples

			a(1)=2 because (2-2)! + 1 = 0! + 1 = 1 + 1 = 2.
		

Links

• Titus Piezas III, Solving Solvable Sextics Using Polynomial Decomposition, 2004.

Crossrefs

Cf. A088054, A002981.

Programs

Mathematica

aa = {}; Do[p = Prime[n]; If[PrimeQ[(p - 2)! + 1], AppendTo[aa, p]], {n, 1, 10000}]; aa

Extensions

New term added by Artur Jasinski, May 19 2010

a(10)-a(12) from Amiram Eldar, Oct 24 2024