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A110918 Integers n such that 10^n+91 is a prime number. 2
1, 2, 3, 4, 11, 12, 15, 19, 136, 144, 732, 5774, 6602, 23499, 39583, 74254, 93356, 94016 (list; graph; refs; listen; history; text; internal format)
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
Sequence in context: A084544 A268236 A039023 * A181542 A160914 A326377
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
STATUS
approved

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Last modified March 18 22:09 EDT 2024. Contains 370951 sequences. (Running on oeis4.)