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URL: https://oeis.org/A156974

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A156974
Primes of the form 2^k + 29.
1
31, 37, 61, 157, 541, 8221, 32797, 131101, 8388637, 134217757, 8589934621, 137438953501, 8796093022237, 9223372036854775837, 590295810358705651741, 9444732965739290427421, 604462909807314587353117, 618970019642690137449562141, 166153499473114484112975882535043101, 170141183460469231731687303715884105757, 883423532389192164791648750371459257913741948437809479060803100646309917
OFFSET
1,1
FORMULA
a(n) = 2^A156982(n) + 29. - Elmo R. Oliveira, Nov 08 2023
MAPLE
a := proc (n) if isprime(2^n+29) = true then 2^n+29 else end if end proc: seq(a(n), n = 1 .. 110); # Emeric Deutsch, Mar 14 2009
MATHEMATICA
Delete[Union[Table[If[PrimeQ[2^n + 29], 2^n + 29, 0], {n, 1, 500}]], 1]
PROG
(Magma) [a: n in [0..300] | IsPrime(a) where a is 2^n+29 ]; // Vincenzo Librandi, Nov 27 2010
CROSSREFS
Cf. A057733 (2^k+3), A123250 (2^k+5), A104066 (2^k+7), A156940 (2^k+11).
Sequence in context: A129998 A180542 A097437 * A215431 A082957 A067826
KEYWORD
nonn
AUTHOR
Edwin Dyke (ed.dyke(AT)btinternet.com), Feb 19 2009
EXTENSIONS
More terms from Emeric Deutsch, Mar 14 2009
More terms from Vincenzo Librandi, Nov 27 2010
STATUS
approved