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A156940 Primes of the form 2^k + 11. 5
13, 19, 43, 139, 523, 32779, 8388619, 536870923, 2147483659, 36028797018963979, 2361183241434822606859, 151115727451828646838283, 254629497041810760783555711051172270131433549208242031329517556169297662470417088272924683 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = 2^A102633(n) + 11. - R. J. Mathar, Feb 20 2009
MATHEMATICA
Delete[Union[Table[If[PrimeQ[2^n + 11], 2^n + 11, 0], {n, 1, 200}]], 1]
PROG
(Magma) [ a: n in [0..350] | IsPrime(a) where a is 2^n+11 ] // Vincenzo Librandi, Nov 26 2010
CROSSREFS
Sequence in context: A098413 A174152 A103176 * A220162 A248483 A274424
KEYWORD
nonn
AUTHOR
Edwin Dyke (ed.dyke(AT)btinternet.com), Feb 18 2009
EXTENSIONS
a(13) from Vincenzo Librandi, Apr 29 2010
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)