A272796 Smallest prime number with prime(n) prime digits.

23, 223, 22273, 2222273, 22222222223, 2222222222273, 22222222222223557, 2222222222222222327, 22222222222222222222327, 22222222222222222222222222577, 2222222222222222222222222223223, 2222222222222222222222222222222222527, 22222222222222222222222222222222222223333

Offset

1,1

Links

Pierre CAMI, Table of n, a(n) for n = 1..125

Prog

(PARI) isok(n) = {if (isprime(n), vd = vecsort(digits(n), , 8); for (i=1, #vd, if (!isprime(vd[i]), return (0))); return (1); ); }
a(n) = {sp = 2*(10^prime(n)-1)/9+1; while (!isok(sp), sp = nextprime(sp+2)); sp; } \\ Michel Marcus, May 07 2016

Crossrefs

Cf. A272768.

Sequence in context: A125386 A091628 A126544 * A285552 A206766 A142490

Adjacent sequences: A272793 A272794 A272795 * A272797 A272798 A272799

Keyword

nonn,base

Author

Pierre CAMI, May 06 2016

Extensions

a(3) corrected by Michel Marcus, May 07 2016

Status

approved