A386166 Primes having only {2, 6, 7, 9} as digits.

2, 7, 29, 67, 79, 97, 227, 229, 269, 277, 677, 727, 769, 797, 929, 967, 977, 997, 2267, 2269, 2297, 2677, 2699, 2729, 2767, 2777, 2797, 2927, 2969, 2999, 6229, 6269, 6277, 6299, 6679, 6779, 6967, 6977, 6997, 7229, 7297, 7669, 7699, 7727, 7927, 9227, 9277, 9629

Offset: 1

Author

Jason Bard, Jul 18 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 A261182, A261184, A385787, A385788.

Cf. A000040, A385776.

Programs

Magma

[p: p in PrimesUpTo(10^6) | Set(Intseq(p)) subset [2, 6, 7, 9]];

Mathematica

Flatten[Table[Select[FromDigits /@ Tuples[{2, 6, 7, 9}, n], PrimeQ], {n, 7}]]

PARI

primes_with(, 1, [2, 6, 7, 9]) \\ uses function in A385776

Python

print(list(islice(primes_with("2679"), 41))) # uses function/imports in A385776