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A236476 Primes p such that p^3 + p - 1 is prime. 0
3, 7, 43, 73, 103, 109, 127, 139, 151, 199, 223, 241, 283, 313, 367, 379, 421, 541, 631, 661, 733, 739, 751, 769, 829, 991, 1117, 1129, 1201, 1231, 1249, 1297, 1303, 1429, 1471, 1663, 1669, 1693, 1699, 1741, 1789, 1867, 1933 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes in the sequence A236475.

LINKS

Table of n, a(n) for n=1..43.

EXAMPLE

241 is prime and 241^3 + 241 - 1 = 13997761 is prime.

PROG

(Python)

import sympy

from sympy import isprime

{print(n) for n in range(10**4) if isprime(n) and isprime(n**3+n-1)}

(PARI)

s=[]; forprime(p=2, 2000, if(isprime(p^3+p-1), s=concat(s, p))); s \\ Colin Barker, Jan 27 2014

CROSSREFS

Cf. A236475.

Sequence in context: A257366 A141304 A213893 * A282178 A101208 A050633

Adjacent sequences:  A236473 A236474 A236475 * A236477 A236478 A236479

KEYWORD

nonn

AUTHOR

Derek Orr, Jan 26 2014

STATUS

approved

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Last modified February 24 01:16 EST 2020. Contains 332195 sequences. (Running on oeis4.)