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A116947 Numbers n such that 4*n^6 + 1 is prime. 0
1, 2, 3, 5, 7, 17, 20, 22, 28, 30, 40, 45, 67, 68, 70, 75, 82, 85, 87, 88, 95, 108, 123, 125, 140, 150, 153, 163, 172, 190, 197, 200, 210, 217, 220, 223, 232, 237, 248, 268, 270, 282, 283, 287, 303, 310, 320, 333, 340, 358, 367, 403, 405, 407, 423, 438, 445, 447 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
If n=197 then (4*n^6 + 1) is a prime with 15 digits.
MATHEMATICA
Select[Range[500], PrimeQ[(4*#^6 + 1)] &] (* Stefan Steinerberger, Apr 06 2006 *)
PROG
(PARI) is(n)=isprime(4*n^6+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A108547 A319823 A286499 * A066277 A360383 A164134
KEYWORD
nonn,less,easy
AUTHOR
Parthasarathy Nambi, Apr 03 2006
EXTENSIONS
More terms from Stefan Steinerberger, Apr 06 2006
STATUS
approved

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Last modified March 28 21:57 EDT 2024. Contains 371254 sequences. (Running on oeis4.)