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A112391 Primes p such that 23*p + 2 is also prime. 1
3, 7, 19, 37, 43, 67, 103, 157, 193, 277, 337, 367, 373, 379, 397, 439, 457, 463, 547, 607, 829, 859, 877, 919, 1009, 1033, 1039, 1117, 1129, 1213, 1249, 1297, 1429, 1543, 1579, 1627, 1657, 1699, 1723, 1759, 1783, 1789, 1867, 1993, 1999, 2053, 2083, 2089 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..48.

EXAMPLE

If p=277 then 23*p + 2 = 6373 (prime).

PROG

(PARI) forprime(p=2, 5000, if(isprime(23*p+2), print1(p, ", "))) // Lambert Herrgesell, Dec 09 2005

(MAGMA) [p: p in PrimesUpTo(3000)|  IsPrime(23*p+2)] // Vincenzo Librandi, Jan 29 2011

CROSSREFS

Cf. A023208.

Sequence in context: A227502 A268065 A049490 * A127928 A298125 A047025

Adjacent sequences:  A112388 A112389 A112390 * A112392 A112393 A112394

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Dec 04 2005

EXTENSIONS

More terms from Lambert Herrgesell (zero815(AT)googlemail.com), Dec 09 2005

STATUS

approved

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Last modified November 21 12:11 EST 2019. Contains 329370 sequences. (Running on oeis4.)