A108330 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A108330

Integers k such that 10^k - 29 is a prime number.

16

2, 3, 5, 7, 8, 13, 14, 761, 794, 2216, 3710, 3860, 3937, 5091, 7754, 29091

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

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 "99971".

LINKS

Table of n, a(n) for n=1..16.

Makoto Kamada, List of near-repdigit-related prime numbers.

Index entries for primes involving repunits.

EXAMPLE

k = 8 is a term because 10^8 - 29 = 100000000 - 29 = 99999971, which is prime.

CROSSREFS

Cf. A089675, A095714, A092767.

Sequence in context: A028756 A028799 A080435 * A262587 A328724 A039892

Adjacent sequences: A108327 A108328 A108329 * A108331 A108332 A108333

KEYWORD

nonn,more

AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Jun 30 2005

EXTENSIONS

a(14)-a(15) from Sean A. Irvine, Mar 04 2010

a(16) from Robert Price, Dec 15 2010

Edited by Ray Chandler, Dec 23 2010

STATUS

approved