|
|
A103888
|
|
Numbers k such that the string 100k001 is prime.
|
|
0
|
|
|
3, 8, 12, 21, 23, 38, 42, 45, 48, 51, 54, 56, 59, 69, 72, 83, 86, 92, 93, 105, 111, 113, 131, 135, 137, 159, 161, 162, 174, 176, 183, 203, 207, 209, 210, 228, 230, 237, 245, 246, 249, 260, 264, 267, 273, 287, 300, 324, 327, 330, 336, 341, 345, 362, 386, 390, 396
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
93 is a term, as 10093001 is prime.
|
|
MATHEMATICA
|
Select[Range[400], PrimeQ[FromDigits[Flatten[Prepend[IntegerDigits[1000#+1], {1, 0, 0}]]]]&] (* James C. McMahon, Jan 17 2024 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,nonn,less
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|