

A135117


Integers n such that 10^n+87 is a prime number.


1



1, 3, 9, 19, 39, 43, 121, 153, 1243, 14445, 15273, 26779
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OFFSET

1,2


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 "10087".


LINKS

Table of n, a(n) for n=1..12.
Makoto Kamada, List of nearrepdigitrelated prime numbers.
Index entries for primes involving repunits.


EXAMPLE

3 is a member because 10^3+87 = 1000+87 = 1087, which is a prime number.


CROSSREFS

Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.
Sequence in context: A115238 A005994 A080010 * A038163 A146819 A147213
Adjacent sequences: A135114 A135115 A135116 * A135118 A135119 A135120


KEYWORD

more,nonn


AUTHOR

Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008


EXTENSIONS

Added term 14445. Robert Price, Mar 22 2010
Added terms: 1243,15273,26779 Robert Price, Oct 04 2010
Edited by Ray Chandler, Dec 23 2010


STATUS

approved



