A289983 Primes of the form 3^k - 32.

211, 6529, 387420457, 10460353171, 834385168331080533771857328695251, 11972515182562019788602740026717047105649, 228532044137599177017869183161846685251274404207185590172004697234871412029099114058771

Offset: 1

Author

Robert Price, Sep 02 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..8
• 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, A219049 (corresponding k's).

Programs

Mathematica

Select[Table[3^k - 32, {k, 4, 100}], PrimeQ[#] &]

Formula

a(n) = 3^A219049(n) - 32. - Elmo R. Oliveira, Nov 12 2023