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A132237 Primes congruent to {7, 23} mod 30. 4
7, 23, 37, 53, 67, 83, 97, 113, 127, 157, 173, 233, 263, 277, 293, 307, 337, 353, 367, 383, 397, 443, 457, 487, 503, 547, 563, 577, 593, 607, 653, 683, 727, 743, 757, 773, 787, 863, 877, 907, 937, 953, 967, 983, 997, 1013, 1087, 1103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Up to 4913, there are more primes of this form than composites. See also A132231 and A227869 (congruent to 7 only). - M. F. Hasler, Nov 02 2013

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

C. K. Caldwell, The Prime Pages.

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

MATHEMATICA

Select[Prime[Range[1000]], MemberQ[{7, 23}, Mod[#, 30]]&] (* Vincenzo Librandi, Aug 14 2012 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(1300) | p mod 30 in [7, 23] ]; // Vincenzo Librandi, Aug 14 2012

(PARI) is_A132237(n)=setsearch([7, 23], n%30)&&isprime(n) \\ - M. F. Hasler, Nov 02 2013

CROSSREFS

Cf. A000040, A007510, A039949, A068229, A129807.

Sequence in context: A227421 A098029 A098039 * A227064 A143030 A031043

Adjacent sequences:  A132234 A132235 A132236 * A132238 A132239 A132240

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Aug 15 2007

STATUS

approved

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Last modified August 29 04:48 EDT 2015. Contains 261184 sequences.