A135107 Integers n such that 10^n+97 is prime.

1, 2, 3, 9, 10, 14, 19, 67, 94, 201, 241, 589, 934, 1151, 1179, 4957, 6329, 13621, 26425

Offset: 1

Author

Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008

Keywords

• more
• nonn

Comments

The next term, if one exists, is >100000. - Robert Price, Apr 25 2011

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10097".

Examples

			n = 3 is a member because 10^3+97 = 1000+97 = 1097, which is prime.
		

Links

• Makoto Kamada, List of near-repdigit-related prime numbers.
• Index entries for primes involving repunits.

Crossrefs

Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.

Programs

Magma

[n: n in [1..500]| IsPrime(10^n+97)]; // Vincenzo Librandi, Nov 02 2014

Mathematica

Select[Range[2000], PrimeQ[10^# + 97] &] (* Vincenzo Librandi, Nov 02 2014 *)

Extensions

a(14)-a(19) from Robert Price, Nov 06 2010

Edited by Ray Chandler, Dec 23 2010