A309855 Primes p such that 2*p^5-1 is also prime.

7, 151, 379, 547, 631, 727, 769, 1531, 1627, 1741, 1789, 1999, 2131, 2437, 2659, 2797, 2857, 2917, 3217, 3331, 3511, 3919, 3931, 4591, 4651, 4759, 4801, 4831, 4957, 5281, 5689, 5701, 5779, 5821, 5881, 6067, 6217, 6361, 6619, 6871, 7039, 7309, 7489, 7927, 8179, 8221, 8329, 8581, 8641

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Formula

A000040 INTERSECT A309854.

Mathematica

Select[Range[10000], PrimeQ[#]&&PrimeQ[2*(#^5)-1] &] (* Metin Sariyar, Aug 21 2019 *)
Select[Prime[Range[1100]], PrimeQ[2#^5-1]&] (* Harvey P. Dale, Jul 19 2025 *)

Crossrefs

Cf. A182785 (2*p^4-1 prime), A177104 (2*p^3-1 prime), A309854 (2*n^5-1 prime).

Sequence in context: A229880 A070248 A329010 * A364845 A339582 A232446

Adjacent sequences: A309852 A309853 A309854 * A309856 A309857 A309858

Keyword

nonn

Author

R. J. Mathar, Aug 20 2019

Status

approved