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A367572 Numbers k such that k^8*2^k - 1 is a prime. 0
5, 7, 49, 165, 251, 345, 385, 945, 949, 1001, 1963, 2113, 2249, 3751, 4381, 4911, 5133, 10039, 29693, 34901, 73885 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[5000], PrimeQ[#^8*2^# - 1] &] (* Amiram Eldar, Nov 23 2023 *)
PROG
(Magma) [k: k in [1..4000] | IsPrime(k^8*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), A367478 (m = 6), A367561 (m = 7), this sequence (m = 8).
Sequence in context: A110420 A210244 A123789 * A180552 A168545 A320116
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(19)-a(20) from Michael S. Branicky, Nov 23 2023
a(21) from Michael S. Branicky, Nov 25 2023
STATUS
approved

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Last modified May 20 11:05 EDT 2024. Contains 372712 sequences. (Running on oeis4.)