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 A020460 Primes that contain digits 2 and 9 only. 6
 2, 29, 229, 929, 2999, 9929, 22229, 99929, 2222929, 2229299, 2292299, 2299229, 2922229, 2992229, 2992999, 2999299, 2999999, 9222229, 9922229, 9929929, 9929999, 9999299, 9999929, 22229299, 22292929, 22299229, 22929299, 29229229, 29229929 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Flatten[Table[Select[FromDigits/@Tuples[{2, 9}, n], PrimeQ], {n, 8}]] (* Vincenzo Librandi, Jul 27 2012 *) PROG (MAGMA) [p: p in PrimesUpTo(29229929) | Set(Intseq(p)) subset [2, 9]]; // Vincenzo Librandi, Jul 27 2012 CROSSREFS Sequence in context: A179025 A244599 A261268 * A178000 A036939 A124301 Adjacent sequences:  A020457 A020458 A020459 * A020461 A020462 A020463 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified July 18 11:48 EDT 2019. Contains 325139 sequences. (Running on oeis4.)