A386136 Primes having only {1, 6, 7, 9} as digits.

7, 11, 17, 19, 61, 67, 71, 79, 97, 167, 179, 191, 197, 199, 617, 619, 661, 677, 691, 719, 761, 769, 797, 911, 919, 967, 971, 977, 991, 997, 1117, 1171, 1619, 1667, 1669, 1697, 1699, 1777, 1979, 1997, 1999, 6197, 6199, 6619, 6661, 6679, 6691, 6719, 6761, 6779

Offset: 1

Author

Jason Bard, Jul 17 2025

Keywords

• nonn
• base
• easy

Links

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

Crossrefs

Supersequence of A260891, A260893, A261184, A363023.

Cf. A000040, A385776.

Programs

Magma

[p: p in PrimesUpTo(10^6) | Set(Intseq(p)) subset [1, 6, 7, 9]];

Mathematica

Flatten[Table[Select[FromDigits /@ Tuples[{1, 6, 7, 9}, n], PrimeQ], {n, 7}]]

PARI

primes_with(, 1, [1, 6, 7, 9]) \\ uses function in A385776

Python

print(list(islice(primes_with("1679"), 41))) # uses function/imports in A385776