A214704 Primes that contain only the digits (2, 3, 7).

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

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