A260891 Primes having only {1, 6, 7} as digits.

7, 11, 17, 61, 67, 71, 167, 617, 661, 677, 761, 1117, 1171, 1667, 1777, 6661, 6761, 7177, 7717, 11117, 11161, 11171, 11177, 11617, 11677, 11717, 11777, 16111, 16661, 17117, 17167, 17761, 61667, 61717, 66161, 66617, 67777, 71161, 71167, 71171, 71671

Offset: 1

Author

Vincenzo Librandi, Aug 05 2015

Keywords

• nonn
• easy
• base

Comments

A020454, A020455 and A020469 are subsequences.

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..10000
• Index to entries for primes with digits in a given set

Crossrefs

Cf, similar sequences listed in A260889.

Cf. A000040, A020454, A020455, A020469.

Programs

Magma

[p: p in PrimesUpTo(2*10^5) | Set(Intseq(p)) subset [1, 6, 7]];

Mathematica

Select[Prime[Range[2 10^4]], Complement[IntegerDigits[#], {1, 6, 7}] == {} &]