A260382 Primes having only {3, 7, 9} as digits.

3, 7, 37, 73, 79, 97, 337, 373, 379, 397, 733, 739, 773, 797, 937, 977, 997, 3373, 3733, 3739, 3779, 3793, 3797, 7333, 7393, 7793, 7933, 7937, 7993, 9337, 9377, 9397, 9733, 9739, 9973, 33377, 33739, 33773, 33797, 33937, 33997, 37337, 37339, 37379, 37397

Offset

1,1

Comments

A020463 and A020471 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

Mathematica

Select[Prime[Range[5*10^3]], Complement[IntegerDigits[#], {3, 7, 9}]=={} &]

Prog

(Magma) [p: p in PrimesUpTo(2*10^5) | Set(Intseq(p)) subset [3, 7, 9]];

Crossrefs

Cf. similar sequences listed in A260378.

Cf. A000040, A020463, A020471.

Sequence in context: A363667 A386187 A386068 * A386067 A260381 A260378

Adjacent sequences: A260379 A260380 A260381 * A260383 A260384 A260385

Keyword

nonn,easy,base

Author

Vincenzo Librandi, Aug 01 2015

Status

approved