

A108506


Integers n such that 10^n59 is prime.


4



2, 3, 4, 8, 20, 38, 95, 248, 263, 303, 304, 410, 438, 548, 688, 1074, 1575, 8364, 9910, 15910, 37344
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Certified primality of numbers corresponding to terms 410, 438, 548, 688, 1074 and 1575 with Primo.  Ryan Propper, Jul 08 2005
No other terms <40000.
See Kamada link  primecount.txt for terms, primesize.txt for discovery details including probable or proved primes  search on "99941".


LINKS

Table of n, a(n) for n=1..21.
Makoto Kamada, List of nearrepdigitrelated prime numbers.
Index entries for primes involving repunits.


EXAMPLE

8 is a member because: n = 8 gives 10^859 = 10000000059 = 99999941, which is prime.


CROSSREFS

Cf. A089675, A095714, A092767, A108327, A108328, A108329, A108330, A108331, A108332, A177418.
Sequence in context: A276673 A282815 A105055 * A129284 A214700 A100997
Adjacent sequences: A108503 A108504 A108505 * A108507 A108508 A108509


KEYWORD

more,nonn


AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Jul 06 2005


EXTENSIONS

a(18)a(20) from Kamada data by Robert Price, Dec 10 2010
a(21) by Robert Price, Dec 16 2010
Edited by Ray Chandler, Dec 23 2010


STATUS

approved



