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A260382 Primes that contain only the digits (3, 7, 9). 3
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
A020463 and A020471 are subsequences.
LINKS
James Maynard and Brady Haran, Primes without a 7, Numberphile video (2019)
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.
Sequence in context: A049493 A260380 A363667 * A260381 A260378 A020463
KEYWORD
nonn,easy,base
AUTHOR
Vincenzo Librandi, Aug 01 2015
STATUS
approved

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)