A058015 Numbers k such that 2^k + k^3 is prime.

1, 5, 35, 821, 1079, 1301, 3539, 16991, 20087, 29951

Offset: 1

Author

Harrison Brown (nanb(AT)mindspring.com), Nov 14 2000

Keywords

• nonn
• more

Comments

a(11) > 2*10^5. - Michael S. Branicky, Oct 23 2024

Crossrefs

Cf. A000040, A097339.

Programs

Mathematica

Select[Range[0, 5000], PrimeQ[(2^# + #^3)] &] (* Vincenzo Librandi, Sep 29 2012 *)

PARI

is(n)=ispseudoprime(2^n+n^3) \\ Charles R Greathouse IV, Jun 12 2017

Extensions

a(5)-a(6) from Erich Friedman, Jun 15 2001

a(7) from Vincenzo Librandi, Sep 29 2012

a(8)-a(10) from Michael S. Branicky, Jun 14 2021