A108384 Primes p such that p's set of distinct digits is {1,7,9}.

179, 197, 719, 971, 1979, 1997, 7919, 9719, 9791, 11197, 11719, 11779, 11971, 17191, 17791, 17911, 17971, 17977, 19717, 19777, 19979, 19997, 71119, 71191, 71719, 71917, 71971, 71999, 77191, 77719, 79111, 91711, 91771, 91997, 97117, 97171

Offset: 1

Author

Rick L. Shepherd, Jun 01 2005

Keywords

• base
• nonn

Links

• Iain Fox, Table of n, a(n) for n = 1..10000 (first 1000 terms from Harvey P. Dale)

Crossrefs

Cf. A108382 ({1, 3, 7}), A108383 ({1, 3, 9}), A108385 ({3, 7, 9}), A108386 ({1, 3, 7, 9}), A030096 (Primes whose digits are all odd).

Programs

Mathematica

Flatten[Table[Select[FromDigits/@Select[Tuples[{1,7,9},n],Union[#]=={1,7,9}&],PrimeQ],{n,3,5}]] (* Harvey P. Dale, Feb 15 2016 *)

PARI

lista(nn) = forprime(p=179, nn, if(vecsort(digits(p), , 8)==[1, 7, 9], print1(p, ", "))) \\ Iain Fox, Oct 25 2017