login
A135131
Integers n such that 10^n + 79 is a prime number.
1
1, 2, 4, 7, 16, 18, 43, 60, 73, 91, 106, 115, 120, 169, 394, 444, 516, 835, 886, 1912, 3120, 3602, 5664, 10188, 14434, 16564, 23732, 29058, 47728, 63916
OFFSET
1,2
COMMENTS
If any additional terms exist, they are >40000. - Robert Price, Sep 25 2010
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10079".
EXAMPLE
7 is a member because 10^7+79 = 10000000+79 = 10000079, which is a prime number.
MATHEMATICA
Select[Range[1000], PrimeQ[10^# + 79] &] (* G. C. Greubel, Sep 28 2016 *)
KEYWORD
more,nonn
AUTHOR
Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008
EXTENSIONS
Added two terms: 10188 and 14434. Robert Price, Mar 22 2010
Added seven terms: 1912, 3120, 3602, 5664, 16564, 23732, 29058. Robert Price, Sep 25 2010
Edited by Ray Chandler, Dec 23 2010
a(29)=47728 from Robert Price, Dec 31 2010
a(30)=63916 from Robert Price, Jan 29 2011
STATUS
approved