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A214704 Primes that contain only the digits (2, 3, 7). 3
2, 3, 7, 23, 37, 73, 223, 227, 233, 277, 337, 373, 727, 733, 773, 2237, 2273, 2333, 2377, 2777, 3323, 3373, 3727, 3733, 7237, 7333, 7723, 7727, 22273, 22277, 22727, 22777, 23227, 23327, 23333, 23773, 27277, 27337, 27733, 27737, 27773, 32233, 32237, 32323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The digits are prime numbers excluding 5.

LINKS

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

MATHEMATICA

Flatten[Table[Select[FromDigits/@Tuples[{2, 3, 7}, n], PrimeQ], {n, 6}]]

PROG

(MAGMA) [p: p in PrimesUpTo(80000) | Set(Intseq(p)) subset [2, 3, 7]];

CROSSREFS

Subsequence of A019546.

Cf. A087363 (primes with only prime digits excluding 2).

Sequence in context: A118883 A061712 A059661 * A231075 A072686 A002230

Adjacent sequences:  A214701 A214702 A214703 * A214705 A214706 A214707

KEYWORD

nonn,base,easy

AUTHOR

Vincenzo Librandi, Jul 28 2012

STATUS

approved

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Last modified April 19 16:18 EDT 2019. Contains 322282 sequences. (Running on oeis4.)