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A257668 Primes containing a digit 7. 6
7, 17, 37, 47, 67, 71, 73, 79, 97, 107, 127, 137, 157, 167, 173, 179, 197, 227, 257, 271, 277, 307, 317, 337, 347, 367, 373, 379, 397, 457, 467, 479, 487, 547, 557, 571, 577, 587, 607, 617, 647, 673, 677, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Primes in A062675.
Subsequence of primes of A011537. - Michel Marcus, May 03 2015
LINKS
FORMULA
a(n) ~ n log n. - Charles R Greathouse IV, Nov 01 2022
EXAMPLE
For n = 2, a(2) = 17 is the second prime containing a digit of 7.
MATHEMATICA
Select[Prime[Range[150]], ! StringFreeQ[ToString[#], "7"] &]
PROG
(Magma) [p: p in PrimesUpTo(800) | 7 in Intseq(p)];
(Sage) [p for p in primes(800) if 7 in p.digits(base=10)] # Bruno Berselli, May 03 2015
(PARI) lista(nn) = forprime(p=2, nn, if(vecsearch(vecsort(digits(p)), 7), print1(p, ", "))); \\ Altug Alkan, Apr 21 2016; corrected by Michel Marcus, Oct 30 2023
CROSSREFS
Cf. similar sequences listed in A257667.
Cf. A011537, A062675, A166579 (subsequence).
Sequence in context: A339527 A090652 A062675 * A106095 A153319 A030432
KEYWORD
nonn,base,easy
AUTHOR
Vincenzo Librandi, May 03 2015
STATUS
approved

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Last modified July 20 06:10 EDT 2024. Contains 374441 sequences. (Running on oeis4.)