A077500 Primes of the form 2^r*p^s + 1, where p is an odd prime.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 37, 41, 47, 53, 59, 73, 83, 89, 97, 101, 107, 109, 113, 137, 149, 163, 167, 173, 179, 193, 197, 227, 233, 251, 257, 263, 269, 293, 317, 347, 353, 359, 383, 389, 401, 433, 449, 467, 479, 487, 503, 509, 557, 563, 569, 577, 587

Offset

1,1

Comments

Primes p such that p-1 has at most one odd prime divisor.

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

Select[Prime[Range[110]], Length[Select[FactorInteger[#-1] [[All, 1]], OddQ]]<2&] (* Harvey P. Dale, Oct 09 2017 *)

Crossrefs

Cf. A005109, A077497, A077498, A077499.

Sequence in context: A095319 A129621 A316504 * A036955 A040179 A040986

Adjacent sequences: A077497 A077498 A077499 * A077501 A077502 A077503

Keyword

nonn

Author

Amarnath Murthy, Nov 07 2002

Extensions

Corrected and extended by Sascha Kurz, Jan 04 2003

Status

approved