

A108331


Integers n such that 10^n87 is prime.


2




OFFSET

1,1


COMMENTS

See Kamada link  primecount.txt for terms, primesize.txt for discovery details including probable or proved primes  search on "99913".


LINKS

Table of n, a(n) for n=1..4.
Makoto Kamada, List of nearrepdigitrelated prime numbers.
Index entries for primes involving repunits.


EXAMPLE

n = 2 is a member because: 10^287 = 10087 = 13, which is prime.


CROSSREFS

Cf. A089675, A095714, A092767.
Sequence in context: A277389 A011541 A080642 * A263076 A162554 A167840
Adjacent sequences: A108328 A108329 A108330 * A108332 A108333 A108334


KEYWORD

more,nonn


AUTHOR

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


EXTENSIONS

a(4) from Kamada data by Robert Price, Dec 13 2010
Edited by Ray Chandler, Dec 23 2010


STATUS

approved



