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A261184 Primes that contain only the digits (6, 7, 9). 2
7, 67, 79, 97, 677, 769, 797, 967, 977, 997, 6679, 6779, 6967, 6977, 6997, 7669, 7699, 9677, 9679, 9697, 9767, 9769, 9967, 66697, 66797, 66977, 67679, 67699, 67777, 67967, 67979, 69677, 69697, 69767, 69779, 69997, 76667, 76679, 76697, 76777, 77699, 77797 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A020469 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)

MATHEMATICA

Select[Prime[Range[6 10^4]], Complement[IntegerDigits[#], {6, 7, 9}] == {} &]

PROG

(MAGMA) [p: p in PrimesUpTo(2*10^5) | Set(Intseq(p)) subset [6, 7, 9]];

CROSSREFS

Cf. similar sequences listed in A261181.

Cf. A000040, A020469, A020471.

Sequence in context: A210476 A217095 A106111 * A142786 A139783 A103102

Adjacent sequences:  A261181 A261182 A261183 * A261185 A261186 A261187

KEYWORD

nonn,easy,base

AUTHOR

Vincenzo Librandi, Aug 11 2015

STATUS

approved

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Last modified May 26 18:08 EDT 2020. Contains 334630 sequences. (Running on oeis4.)