|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
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".
|
|
LINKS
|
Table of n, a(n) for n=1..30.
Makoto Kamada, List of near-repdigit-related prime numbers.
Index entries for primes involving repunits.
|
|
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 *)
|
|
CROSSREFS
|
Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.
Sequence in context: A247291 A030033 A280031 * A032363 A303749 A239390
Adjacent sequences: A135128 A135129 A135130 * A135132 A135133 A135134
|
|
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
|
|
|
|