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

Jason Bard, Table of n, a(n) for n = 1..10000 (first 1000 terms from Vincenzo Librandi)

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).

Cf. A385776 (main sequence for primes containing three distinct digits).

Sequence in context: A386147 A386150 A386044 * A231075 A072686 A002230

Adjacent sequences: A214701 A214702 A214703 * A214705 A214706 A214707

Keyword

nonn,base,easy

Author

Vincenzo Librandi, Jul 28 2012

Status

approved