A291862 Primes of the form 7^k + 12.

13, 19, 61, 40353619, 59768263894155949306790119265585619217025149412430681661, 3945286644626550630858717985746264080026751644458455916464504975630931364915053228398031941487628933218072924433889392982611734440563298413

Offset: 1

Author

Robert Price, Sep 04 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 & Renaud Lifchitz, PRP Records
• OpenPFGW Project, Primality Tester

Crossrefs

Cf. A152213.

Programs

Mathematica

Select[Table[7^k+12, {k, 0, 100}], PrimeQ[#] &]