A102704 Numbers k such that k999 is prime.

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

Links

Table of n, a(n) for n=1..50.

Chris Caldwell, The First 100,008 Primes.

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

Adjacent sequences: A102701 A102702 A102703 * A102705 A102706 A102707

Keyword

nonn,base

Author

Parthasarathy Nambi, Feb 04 2005

Extensions

More terms from Stefan Steinerberger, Feb 22 2006

Status

approved