A126330 - OEIS

%I #12 Oct 10 2019 13:53:39

%S 11,23,31,47,71,79,127,151,167,191,239,271,359,431,439,599,607,631,

%T 719,727,911,919,967,1031,1087,1231,1327,1399,1439,1471,1559,1607,

%U 1759,1831,1847,1871,1951,1999,2039,2087,2287,2311,2351,2399,2591,2647,2711,2767

%N Primes of the form 4p+3 where p is a prime.

%H Robert Israel, <a href="/A126330/b126330.txt">Table of n, a(n) for n = 1..10000</a>

%p select(p -> isprime(p) and isprime((p-3)/4), [seq(p,p=7..10000,4)]); # _Robert Israel_, Aug 08 2019

%t Select[3 + 4Prime@Range[130], PrimeQ] (* _Ray Chandler_, Jun 29 2008 *)

%Y For the primes p see A023213.

%Y Cf. A002145, A004767, A080148, A090866, A095278.

%K nonn

%O 1,1

%A _J. M. Bergot_, Mar 09 2007

%E Checked and extended by _N. J. A. Sloane_, Mar 10 2007