login
A216848
Odd numbers for which 2 is not a primitive root.
3
7, 15, 17, 21, 23, 31, 33, 35, 39, 41, 43, 45, 47, 49, 51, 55, 57, 63, 65, 69, 71, 73, 75, 77, 79, 85, 87, 89, 91, 93, 95, 97, 99, 103, 105, 109, 111, 113, 115, 117, 119, 123, 127, 129, 133, 135, 137, 141, 143, 145, 147, 151, 153, 155, 157, 159, 161, 165, 167
OFFSET
1,1
LINKS
MATHEMATICA
nn = 200; Select[Range[3, nn, 2], PrimitiveRoot[#] =!= 2 &] (* T. D. Noe, Sep 19 2012 *)
PROG
(PARI) forstep(p=3, 200, 2, if(znorder(Mod(2, p))!=eulerphi(p), print(p)))
CROSSREFS
KEYWORD
nonn
AUTHOR
V. Raman, Sep 17 2012
STATUS
approved