A322749 Primes in A032420.

3, 5, 7, 31, 37, 41, 61, 103, 137, 2053, 125887, 968467

Offset

1,1

Comments

Equivalently, primes p such that 141*2^p+1 is prime.

Links

Table of n, a(n) for n=1..12.

Maple

select(p->isprime(p) and isprime(141*2^p+1), [$1..400]);

Mathematica

Select[Prime[Range[140]], PrimeQ[141*2^#+1]&] (* Harvey P. Dale, Sep 04 2023 *)

Prog

(GAP) Filtered([1..400], p->IsPrime(p) and IsPrime(141*2^p+1));

Crossrefs

Subsequence of A032420.

Sequence in context: A124077 A288891 A358699 * A270269 A247104 A006378

Adjacent sequences: A322746 A322747 A322748 * A322750 A322751 A322752

Keyword

nonn,more

Author

Muniru A Asiru, Dec 25 2018

Status

approved