A289984 Primes of the form 3^k - 34.

47, 2153, 177113, 1594289, 68630377364849, 1853020188851807, 150094635296999087, 984770902183611232847, 49269609804781974438694403402127765833, 809164816771822689786320611221860560835816670552324143733808294394923420529

Offset: 1

Author

Robert Price, Sep 02 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..12
• F. Firoozbakht and M. F. Hasler, Variations on Euclid's formula for Perfect Numbers, JIS 13 (2010) #10.3.1.
• Henri and Renaud Lifchitz, PRP Records
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A000040, A219051 (corresponding k's).

Programs

Mathematica

Select[Table[3^k - 34, {k, 4, 100}], PrimeQ[#] &]

Formula

a(n) = 3^A219051(n) - 34. - Elmo R. Oliveira, Nov 12 2023