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A102704
Numbers k such that k999 is prime.
0
1, 2, 4, 8, 13, 25, 32, 35, 41, 49, 52, 56, 59, 70, 71, 73, 77, 79, 85, 94, 98, 100, 101, 104, 107, 133, 134, 136, 137, 139, 143, 157, 161, 164, 172, 179, 182, 184, 188, 191, 199, 202, 203, 212, 221, 223, 230, 239, 242, 247
OFFSET
1,2
COMMENTS
Also numbers k such that 1000*k + 999 is prime. - Stefan Steinerberger, Feb 22 2006
EXAMPLE
If k=1, then k999 = 1999 (prime).
If k=25, then k999 = 25999 (prime).
If k=49, then k999 = 49999 (prime).
MATHEMATICA
Do[If[PrimeQ[1000*n + 999], Print[n]], {n, 1, 250}] (* Stefan Steinerberger, Feb 22 2006 *)
CROSSREFS
Sequence in context: A226060 A262569 A248876 * A196720 A212906 A043774
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Feb 04 2005
EXTENSIONS
More terms from Stefan Steinerberger, Feb 22 2006
STATUS
approved