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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
OFFSET
1,1
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
Sequence in context: A054296 A155704 A105189 * A303305 A236685 A165719
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Feb 26 2005
STATUS
approved