A386096 Primes having only {1, 2, 5, 7} as digits.

2, 5, 7, 11, 17, 71, 127, 151, 157, 211, 227, 251, 257, 271, 277, 521, 557, 571, 577, 727, 751, 757, 1117, 1151, 1171, 1217, 1277, 1511, 1571, 1721, 1777, 2111, 2221, 2251, 2521, 2551, 2557, 2711, 2777, 5171, 5227, 5521, 5527, 5557, 5711, 5717, 7121, 7127, 7151

Offset

1,1

Links

Jason Bard, Table of n, a(n) for n = 1..10000

Index to entries for primes with digits in a given set

Mathematica

Flatten[Table[Select[FromDigits /@ Tuples[{1, 2, 5, 7}, n], PrimeQ], {n, 7}]]

Prog

(Magma) [p: p in PrimesUpTo(10^6) | Set(Intseq(p)) subset [1, 2, 5, 7]];
(Python) print(list(islice(primes_with("1257"), 41))) # uses function/imports in A385776
(PARI) primes_with(, 1, [1, 2, 5, 7]) \\ uses function in A385776

Crossrefs

Supersequence of A214705, A260828, A260889, A385773.

Cf. A000040, A385776.

Sequence in context: A386344 A224320 A247052 * A364649 A163695 A134641

Adjacent sequences: A386093 A386094 A386095 * A386097 A386098 A386099

Keyword

nonn,base,easy

Author

Jason Bard, Jul 16 2025

Status

approved