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A103401
Numbers k such that k211 is prime.
7
0, 4, 6, 7, 10, 12, 18, 19, 21, 27, 28, 30, 33, 34, 49, 58, 61, 63, 67, 72, 75, 84, 87, 88, 96, 105, 108, 109, 111, 115, 118, 126, 130, 135, 142, 147, 150, 154, 157, 163, 165, 168, 175, 177, 180, 181, 184, 186, 187, 199, 201, 205, 214, 216, 223, 228, 234, 235, 249, 256, 258, 259, 264, 268, 271, 279
OFFSET
1,2
COMMENTS
Also numbers k such that 1000*k+211 is prime. - Stefan Steinerberger, Feb 12 2006
LINKS
EXAMPLE
If k=27, then k211 = 27211 (prime).
If k=72, then k211 = 72211 (prime).
MATHEMATICA
For[n = 0, n < 220, n++, If[PrimeQ[1000*n + 211], Print[n]]] (* Stefan Steinerberger, Feb 12 2006 *)
Select[Range[0, 300], PrimeQ[1000#+211]&] (* Harvey P. Dale, Dec 14 2021 *)
PROG
(Magma) [ n: n in [0..700] | IsPrime(Seqint([1, 1, 2] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 03 2011
CROSSREFS
Sequence in context: A089532 A285254 A326227 * A285091 A286485 A363189
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Mar 20 2005
EXTENSIONS
More terms from Stefan Steinerberger, Feb 12 2006
STATUS
approved