login
A057737
Primes of the form 2^p + 3, where p is prime.
2
7, 11, 131, 147573952589676412931
OFFSET
1,1
COMMENTS
The next term in the sequence is larger than 2^2741+3 > 10^825. - Philip Sung (philip_sung(AT)hotmail.com), Feb 02 2003
The next term in the sequence is larger than 2^100003+3 > 10^30104. - after Ryan Propper, Aug 24 2005
FORMULA
a(n) = 2^A057736(n) + 3. - Felix Fröhlich, Aug 09 2019
MATHEMATICA
Select[Table[2^p+3, {p, Prime[Range[67]]}], PrimeQ] (* Metin Sariyar, Aug 09 2019 *)
PROG
(PARI) forprime(p=1, , my(x=2^p+3); if(ispseudoprime(x), print1(x, ", "))) \\ Felix Fröhlich, Aug 09 2019
CROSSREFS
Cf. A057736.
Sequence in context: A371485 A355577 A241189 * A130704 A335813 A038543
KEYWORD
nonn
AUTHOR
G. L. Honaker, Jr., Oct 29 2000
STATUS
approved