login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A108330 Integers n such that 10^n-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. [From 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

n = 8 is a member because: 10^8-29 = 100000000-29 = 99999971, which is prime.

CROSSREFS

Cf. A089675, A095714, A092767.

Sequence in context: A028756 A028799 A080435 * A262587 A039892 A278645

Adjacent sequences:  A108327 A108328 A108329 * A108331 A108332 A108333

KEYWORD

more,nonn

AUTHOR

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

EXTENSIONS

5091 and 7754 from Sean A. Irvine, Mar 04 2010

a(16) = 29091 from Robert Price, Dec 15 2010

Edited by Ray Chandler, Dec 23 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified September 26 05:09 EDT 2017. Contains 292502 sequences.