A244064 Primes which are concatenation of prime(n), prime(10n) and prime(100n).

4173310657, 97158322307, 137221330559, 223341346447, 251390752919, 271423157191, 367552173973, 433647386371, 487729796581, 491741197813, 5097643101281, 6018831116447, 6179109119983, 6439439124577, 70910343136379, 71910459137477, 82311933155327, 82912109157739

Offset

1,1

Links

K. D. Bajpai, Table of n, a(n) for n = 1..11139

Example

4173310657 is in the sequence because concatenation of [prime(13), prime(130), prime(1300)] = 4173310657, which is a prime.
97158322307 is in the sequence because concatenation of [prime(25), prime(250), prime(2500)] = 97158322307, which is a prime.

Maple

with(numtheory): with(StringTools): A244064:= proc() local a, b, c, m; a:=ithprime(n); b:=ithprime(10*n); c:=ithprime(100*n); m:=parse(cat(a, b, c)); if isprime(m) then RETURN (m); fi; end: seq(A244064 (), n=1..300);

Mathematica

A244064 = {}; Do[t = FromDigits[Flatten[IntegerDigits /@ {Prime[n], Prime[10 n], Prime[100 n]}]]; If[PrimeQ[t], AppendTo[A244064, t]], {n, 300}]; A244064

Crossrefs

Cf. A000040, A030469.

Cf. A031343 (prime(10n)), A031921 (prime(100n)).

Sequence in context: A038831 A038820 A198161 * A255344 A186590 A186599

Adjacent sequences: A244061 A244062 A244063 * A244065 A244066 A244067

Keyword

nonn,base

Author

K. D. Bajpai, Jun 19 2014

Status

approved