OFFSET
1,1
EXAMPLE
If k=3, then k11111 = 311111 (prime).
If k=60, then k11111 = 6011111 (prime).
If k=126, then k11111 = 12611111 (prime).
MATHEMATICA
Select[Range[500], PrimeQ[100000#+11111]&] (* Harvey P. Dale, Jan 15 2013 *)
PROG
(Magma) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 04 2011
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Feb 22 2005
STATUS
approved