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A108052 Integers n such that 10^n+19 is a prime number. 27
1, 3, 5, 7, 10, 11, 17, 59, 81, 108, 574, 629, 1069, 1759, 2063, 2682, 9174, 40929, 42457, 66033 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Verified terms through 9174. - Robert Price, May 24 2010
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10019".
No other terms <= 100,000. - Robert Price, Mar 03 2011
LINKS
EXAMPLE
n = 7 we have 10^7+19 = 10000000+19 = 10000019, which is prime.
MATHEMATICA
Select[Range[2*10^3], PrimeQ[10^#+19]&] - Vladimir Joseph Stephan Orlovsky, Apr 29 2008
PROG
(PARI) is(n)=ispseudoprime(10^n+19) \\ Charles R Greathouse IV, Apr 28 2015
CROSSREFS
Sequence in context: A350575 A206812 A189372 * A359113 A046868 A225240
KEYWORD
more,nonn
AUTHOR
Julien Peter Benney (jpbenney(AT)ftml.net), Jun 01 2005
EXTENSIONS
a(17)=9174 from Ryan Propper, Jan 02 2008
Edited by Ray Chandler, Dec 23 2010
a(18)=40929 and a(19)=42457 from Robert Price, Dec 27 2010
a(20)=66033 from Robert Price, Jan 09 2011
STATUS
approved

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)