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A300406 Primes of the form 13*2^n + 1. 3
53, 3329, 13313, 13631489, 3489660929, 62864142619960717084721153, 5100145160001678120616578906356228963083163798627028041729, 6779255729241169695101387251026410519979286814120235842117075415451380965612384558178346467329, 1735489466685739441945955136262761093114697424414780375581971306355553527196770446893656695635969 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For the corresponding exponents n see A032356.

LINKS

Table of n, a(n) for n=1..9.

Ray Ballinger, Wilfried Keller, List of primes k*2^n + 1 for k < 300.

FORMULA

a(n) = A168596(A032356(n)). - Michel Marcus, Mar 29 2018

MAPLE

a:=(n, k)->`if`(isprime(k*2^n+1), k*2^n+1, NULL):

seq(a(n, 13), n=1..316);

MATHEMATICA

Select[Table[13 2^n + 1, {n, 400}], PrimeQ] (* Vincenzo Librandi, Mar 06 2018 *)

PROG

(Magma) [a: n in [1..400] | IsPrime(a) where a is 13*2^n + 1]; // Vincenzo Librandi, Mar 06 2018

(GAP) Filtered(List([1..500], n->13*2^n + 1), IsPrime); # Muniru A Asiru, Mar 06 2018

(PARI) lista(nn) = {for(k=1, nn, if(ispseudoprime(p=13*2^k+1), print1(p, ", "))); } \\ Altug Alkan, Mar 29 2018

CROSSREFS

Cf. A019434, A039687, A032356, A050527, A050528, A050529, A173236, A195745, A050526, A300407, A300408.

Sequence in context: A263516 A243231 A280357 * A013542 A200917 A234630

Adjacent sequences: A300403 A300404 A300405 * A300407 A300408 A300409

KEYWORD

nonn

AUTHOR

Martin Renner, Mar 05 2018

STATUS

approved

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Last modified February 6 03:21 EST 2023. Contains 360091 sequences. (Running on oeis4.)