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 A234901 Primes which remain prime when the digits are rotated once to the right. 2
 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 173, 197, 199, 271, 277, 311, 313, 337, 373, 379, 397, 419, 479, 491, 571, 577, 593, 617, 631, 673, 719, 733, 811, 839, 877, 911, 919, 971, 977, 991, 1031, 1039, 1091, 1093, 1097, 1171, 1193, 1213 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Lars Blomberg, Table of n, a(n) for n = 1..10000 EXAMPLE The prime 1097 is in the list because 7109 is also prime. MATHEMATICA Select[Prime[Range[200]], PrimeQ[FromDigits[RotateRight[IntegerDigits[#]]]]&] (* Harvey P. Dale, May 05 2022 *) PROG (PARI) rotr(a) = if(a<10, a, eval(Str(a%10, a\10))) s=[]; forprime(n=2, 2000, if(isprime(rotr(n)), s=concat(s, n))); s (Magma) r:=func; [p: p in PrimesUpTo(1300) | IsPrime(r(p))]; // Bruno Berselli, Jul 04 2014 CROSSREFS Cf. A061461, A227916, A227919. Sequence in context: A007500 A090933 A107845 * A090934 A068652 A003459 Adjacent sequences: A234898 A234899 A234900 * A234902 A234903 A234904 KEYWORD nonn,base AUTHOR Colin Barker, Jan 01 2014 STATUS approved

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Last modified June 15 13:08 EDT 2024. Contains 373407 sequences. (Running on oeis4.)