

A135132


Integers n such that 10^n + 73 is a prime number.


1




OFFSET

1,2


COMMENTS

a(5) to a(7) were certified prime with PRIMO.  Bernardo Boncompagni, Nov 07 2008
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 "10073".


LINKS

Table of n, a(n) for n=1..10.
Makoto Kamada, List of nearrepdigitrelated prime numbers.
Index entries for primes involving repunits.


EXAMPLE

8 is a member because 10^8+73 = 100000000+73 = 100000073, which is prime.


MATHEMATICA

Select[Range[1000], PrimeQ[10^# + 73] &] (* G. C. Greubel, Sep 28 2016 *)


CROSSREFS

Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.
Sequence in context: A093918 A254313 A209429 * A178060 A007543 A171620
Adjacent sequences: A135129 A135130 A135131 * A135133 A135134 A135135


KEYWORD

more,nonn,changed


AUTHOR

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


EXTENSIONS

a(7) from Bernardo Boncompagni, Nov 07 2008
Added term 13015. Robert Price, Mar 22 2010
Added two terms: 3518,6211. Robert Price, Oct 10 2010
Edited by Ray Chandler, Dec 23 2010


STATUS

approved



