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A260829 Primes that contain only the digits (5, 6, 7). 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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)

MATHEMATICA

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

PROG

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

CROSSREFS

Cf. similar sequences listed in A260827.

Cf. A020467, A020469.

Sequence in context: A108200 A077780 A307361 * A130189 A180755 A073624

Adjacent sequences:  A260826 A260827 A260828 * A260830 A260831 A260832

KEYWORD

nonn,easy,base

AUTHOR

Vincenzo Librandi, Aug 02 2015

STATUS

approved

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Last modified May 7 20:36 EDT 2021. Contains 343652 sequences. (Running on oeis4.)