A260829 Primes having only {5, 6, 7} as digits.

5, 7, 67, 557, 577, 677, 757, 5557, 5657, 6577, 7577, 7757, 55667, 56767, 57557, 57667, 65557, 65657, 65677, 65777, 67567, 67577, 67757, 67777, 75557, 75577, 75767, 76667, 76757, 76777, 77557, 555557, 555677, 555767, 557567, 565567, 565667, 566557, 566567

Offset: 1

Author

Vincenzo Librandi, Aug 02 2015

Keywords

• nonn
• easy
• base

Comments

A020467 and A020469 are subsequences.

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..10000
• James Maynard and Brady Haran, Primes without a 7, Numberphile video (2019)
• Index to entries for primes with digits in a given set

Crossrefs

Cf. similar sequences listed in A260827.

Cf. A020467, A020469.

Programs

Magma

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

Mathematica

Select[Prime[Range[2 10^5]], Complement[IntegerDigits[#], {5, 6, 7}] == {} &]