A053184 Primes p such that p^2+p-1 is prime.

2, 3, 5, 11, 13, 19, 31, 41, 53, 59, 83, 89, 101, 103, 131, 149, 163, 181, 191, 193, 199, 233, 241, 263, 281, 331, 349, 373, 401, 419, 431, 433, 449, 461, 463, 499, 541, 569, 571, 659, 673, 683, 691, 709, 739, 743, 761, 769, 809, 863, 881, 941, 1013, 1039

Offset: 1

Author

Enoch Haga, Mar 01 2000

Keywords

• nonn
• easy

Links

• Pierre CAMI, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A053182, A065508, A091567.

Programs

Magma

[p: p in PrimesUpTo(1050) | IsPrime(p^2+p-1)]; // Bruno Berselli, Nov 08 2011

Mathematica

Select[Prime[Range[175]], PrimeQ[#^2+#-1]&] (* Bruno Berselli, Nov 08 2011 *)

PARI

isA053184(n)=isprime(n) && isprime(n^2+n-1) \\ Michael B. Porter, May 10 2010