A260893 - OEIS

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A260893

Primes that contain only the digits (1, 7, 9).

7, 11, 17, 19, 71, 79, 97, 179, 191, 197, 199, 719, 797, 911, 919, 971, 977, 991, 997, 1117, 1171, 1777, 1979, 1997, 1999, 7177, 7717, 7919, 9199, 9719, 9791, 11117, 11119, 11171, 11177, 11197, 11717, 11719, 11777, 11779, 11971, 17117, 17191, 17791, 17911

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

A020455, A020457 and A020471 are subsequences.

Subsequence of A030096.

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Prime[Range[3 10^3]], Complement[IntegerDigits[#], {1, 7, 9}] == {}&]

PROG

(Magma) [p: p in PrimesUpTo(3*10^4) | Set(Intseq(p)) subset [1, 7, 9]];