A305836 - OEIS

A305836

Numbers k such that (2^k-1)^4 + 2 is prime.

0, 1, 2, 4, 6, 10, 12, 30, 78, 244, 490, 760, 1808, 4790, 34330

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OFFSET

1,3

COMMENTS

a(16) > 10^5. - Robert Price, Jul 21 2018

LINKS

MATHEMATICA

Select[Range@ 2000, PrimeQ[(2^# - 1)^4 + 2] &] (* Michael De Vlieger, Jun 11 2018 *)

PROG

(PARI) is(n)=ispseudoprime((2^n-1)^4+2)

CROSSREFS

Cf. A128832 ((2^n-1)^4).

KEYWORD

nonn,more

AUTHOR

EXTENSIONS

a(14) from Vaclav Kotesovec, Jun 16 2018

a(15) from Robert Price, Jun 20 2018

STATUS

approved