|
| |
|
|
A100456
|
|
Values of n for which the decimal number 10...050...01 is an n-digit prime.
|
|
2
|
|
|
|
3, 5, 9, 11, 17, 55, 331, 461, 475, 739, 971, 1257, 1751, 1929, 2839, 8167
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Three is a term because 151 is a prime, thus illustrating that zeros are optional in the resulting primes. - Harvey P. Dale, Oct 08 2019
|
|
|
LINKS
|
|
|
|
MATHEMATICA
|
IntegerLength/@Select[Table[FromDigits[Join[PadRight[{1}, n, 0], {5}, PadLeft[ {1}, n, 0]]], {n, 5000}], PrimeQ] (* Harvey P. Dale, Oct 08 2019 *)
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn,base,more
|
|
|
AUTHOR
|
Harvey Dubner (harvey(AT)dubner.com), Nov 23 2004
|
|
|
EXTENSIONS
|
|
|
|
STATUS
|
approved
|
| |
|
|
