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A104069 Primes of the form 2^k + 31. 1
47, 4127, 68719476767, 3599131035634557106248430806148785487095757694641533306480604458089470064537190296255232548883112685719936728506816716098566612844395439751206812144692131084107807 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Associated values of k are 4, 12, 36, 540, 844, 1192, ...  - M. F. Hasler, Nov 13 2010

LINKS

Table of n, a(n) for n=1..4.

MATHEMATICA

a = Delete[Union[Flatten[Table[If [PrimeQ[2^n + 31] == True, 2^n + 31, 0], {n, 1, 400}]]], 1]

PROG

(MAGMA) [ a: n in [0..750] | IsPrime(a) where a is 2^n+31] // Vincenzo Librandi, Nov 13 2010

(PARI) for(n=0, 999, ispseudoprime(p=2^n+31) & print1(p", "))  \\ M. F. Hasler, Nov 13 2010

CROSSREFS

Cf. A247952 (associated values of k).

Sequence in context: A327770 A005148 A123798 * A334180 A194617 A217229

Adjacent sequences:  A104066 A104067 A104068 * A104070 A104071 A104072

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Mar 02 2005

STATUS

approved

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Last modified May 25 20:09 EDT 2022. Contains 354071 sequences. (Running on oeis4.)