A269575 Primes of the form 10^n + 91.

101, 191, 1091, 10091, 100000000091, 1000000000091, 1000000000000091

Offset: 1

Author

Mironov Alexander, Mar 01 2016

Keywords

• nonn

Crossrefs

Cf. A110918.

Programs

Mathematica

Select[10^Range[10] + 91, PrimeQ] (* Alonso del Arte, Mar 01 2016 *)

PARI

lista(nn) = for(n=1, nn, if(ispseudoprime(p=10^n+91), print1(p, ", "))); \\ Altug Alkan, Apr 16 2016

Formula

a(n)= 10^A110918(n) + 91.