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A260828 Primes that contain only the digits (1, 5, 7). 3
5, 7, 11, 17, 71, 151, 157, 557, 571, 577, 751, 757, 1117, 1151, 1171, 1511, 1571, 1777, 5171, 5557, 5711, 5717, 7151, 7177, 7517, 7577, 7717, 7757, 11117, 11171, 11177, 11551, 11717, 11777, 15511, 15551, 17117, 17551, 51151, 51157, 51511, 51517, 51551 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A020453, A020455 and A020467 are subsequences.

Subsequence of A030096.

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 10^4]], Complement[IntegerDigits[#], {1, 5, 7}] == {} &]

PROG

(MAGMA) [p: p in PrimesUpTo(2*10^5) | Set(Intseq(p)) subset [1, 5, 7]];

CROSSREFS

Cf. similar sequences listed in A260827.

Cf. A000040, A020453, A020455, A020467, A030096.

Sequence in context: A134572 A106954 A027755 * A280651 A089785 A226383

Adjacent sequences:  A260825 A260826 A260827 * A260829 A260830 A260831

KEYWORD

nonn,easy,base

AUTHOR

Vincenzo Librandi, Aug 02 2015

STATUS

approved

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Last modified April 22 15:41 EDT 2021. Contains 343177 sequences. (Running on oeis4.)