|
|
A102816
|
|
Numbers k such that k111111111 is prime.
|
|
0
|
|
|
14, 17, 31, 35, 40, 53, 58, 73, 77, 94, 95, 101, 109, 116, 142, 149, 164, 196, 218, 226, 227, 233, 236, 253, 256, 257, 266, 268, 281, 295, 302, 311, 340, 341, 355, 359, 374, 385, 415, 418, 421, 428, 442, 443, 466, 469, 491, 542, 563, 571, 583, 599, 604, 614, 632, 656, 665, 667, 668
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
If k=14, then k111111111 = 14111111111 (prime).
If k=73, then k111111111 = 73111111111 (prime).
If k=142, then k111111111 = 142111111111 (prime).
|
|
PROG
|
(Magma) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1, 1, 1, 1, 1] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 03 2011
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|