OFFSET

1,2

COMMENTS

No additional terms < 100000.

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10091".

LINKS

EXAMPLE

n = 4 is a member: 10^4+91 = 10000+91 = 10091, which is prime.

MATHEMATICA

Select[Range[2000], PrimeQ[10^# + 91] &] (* Vincenzo Librandi, Nov 02 2014 *)

PROG

(Magma) [n: n in [1..400]| IsPrime(10^n+91)]; // Vincenzo Librandi, Nov 02 2014

CROSSREFS

KEYWORD

more,nonn

AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005

EXTENSIONS

a(1)=1 added by Vladimir Joseph Stephan Orlovsky, May 02 2008

a(12)-a(15) from Robert Price, Dec 12 2010

Edited by Ray Chandler, Dec 23 2010

a(16)=74254 from Robert Price, Mar 03 2011

a(17)=92178 and a(18)=94016 from Robert Price, Apr 19 2011

a(17)=93356 corrected by Robert Price, Apr 19 2011

a(12) corrected by Tyler Busby, May 03 2024

STATUS

approved