A290005 Primes of the form 3^k + 32.

41, 59, 113, 761, 94143178859, 282429536513, 1350851717672992121, 1769643454279976222562683176742209046547931058497932902345838739841697520771313, 11610630703530923996233764322605633554400975674804937772291047972101377433780374673

Offset: 1

Author

Robert Price, Sep 03 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..14
• 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, A219048 (corresponding k's).

Programs

Mathematica

Select[Table[3^k+32, {k, 0, 100}], PrimeQ[#] &]

Formula

a(n) = 3^A219048(n) + 32. - Elmo R. Oliveira, Nov 12 2023