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A367478
Numbers k such that k^6*2^k - 1 is a prime.
3
37, 43, 167, 217, 239, 349, 581, 1297, 5183, 9119, 10589, 15205, 18745, 25687, 26609, 33667, 35663, 73603, 82501, 89269
OFFSET
1,1
MATHEMATICA
Select[Range[6000], PrimeQ[#^6*2^# - 1] &] (* Amiram Eldar, Nov 19 2023 *)
PROG
(Magma) [k: k in [1..1000] | IsPrime(k^6*2^k-1)];
CROSSREFS
Numbers k such that k^m*2^k - 1 is a prime: A000043 (m = 0), A002234 (m = 1), A058781 (m = 2), A367037 (m = 3), A367102 (m = 4), A367464 (m = 5), this sequence (m = 6).
Sequence in context: A039950 A186281 A225423 * A322098 A039351 A043174
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(12) inserted by and a(14)-a(17) from Michael S. Branicky, Nov 19 2023
a(18)-a(20) from Michael S. Branicky, Nov 21 2023
STATUS
approved