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A348699 Primes with a prime number of prime digits. 2
23, 37, 53, 73, 127, 137, 157, 173, 223, 227, 229, 233, 239, 251, 257, 263, 271, 277, 283, 293, 307, 313, 317, 331, 337, 347, 353, 359, 367, 373, 379, 383, 397, 433, 457, 503, 521, 523, 547, 557, 563, 571, 577, 587, 593, 653, 673, 677, 727, 733, 739, 743, 751, 757, 773, 787, 797 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Hackerearth, Optimus prime
MATHEMATICA
Select[Range[800], And @@ PrimeQ[{#, Count[IntegerDigits[#], _?PrimeQ]}] &] (* Amiram Eldar, Nov 04 2021 *)
PROG
(Python)
from sympy import isprime as i
from sympy import primerange as p
print([x for x in p(1, 800) if i(len([d for d in str(x) if i(int(d))]))])
CROSSREFS
Intersection of A000040 and A092619.
Cf. A217090.
Sequence in context: A066064 A163759 A190731 * A092622 A129351 A179910
KEYWORD
base,easy,nonn
AUTHOR
Jens Ahlström, Oct 30 2021
STATUS
approved

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Last modified June 18 08:27 EDT 2024. Contains 373472 sequences. (Running on oeis4.)