|
|
A056797
|
|
Numbers k such that 9*10^k+1 is prime.
|
|
11
|
|
|
3, 4, 5, 9, 22, 27, 36, 57, 62, 78, 201, 537, 696, 790, 905, 1038, 66886, 70500, 91836, 100613, 127240, 380734, 583696, 719055, 823037, 862868
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
|
|
EXAMPLE
|
For k=9 we have (9*(10^9))+1 = 9000000001, which is prime.
|
|
MATHEMATICA
|
Do[ If[ PrimeQ[9*10^n + 1], Print[n]], {n, 0, 10000}]
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|