A144232 Prime numbers of the form 4^k +- 3.

7, 13, 19, 61, 67, 1021, 4093, 4099, 16381, 65539, 262147, 1048573, 4194301, 16777213, 268435459, 1073741827, 19342813113834066795298819, 19807040628566084398385987581, 83076749736557242056487941267521533, 5316911983139663491615228241121378301, 1427247692705959881058285969449495136382746621

Offset: 1

Author

Reikku Kulon, Sep 15 2008

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..35

Crossrefs

Subset of A122834.

Cf. A000040, A000668, A144231.

Programs

Mathematica

Select[Flatten[Table[4^n+{3,-3},{n,100}]],PrimeQ]//Union (* Harvey P. Dale, Nov 13 2020 *)

Extensions

a(20)-a(21) from Amiram Eldar, Jul 24 2025