login
A040085
Primes p such that x^3 = 20 has a solution mod p.
2
2, 3, 5, 7, 11, 17, 19, 23, 29, 41, 47, 53, 59, 61, 71, 83, 89, 97, 101, 107, 113, 127, 131, 137, 149, 151, 167, 173, 179, 191, 193, 197, 227, 233, 239, 251, 257, 263, 269, 281, 293, 311, 317, 347, 353, 359, 373
OFFSET
1,1
COMMENTS
Complement of A040086 relative to A000040. - Vincenzo Librandi, Sep 13 2012
LINKS
MATHEMATICA
ok [p_]:=Reduce[Mod[x^3 - 20, p] == 0, x, Integers] =!= False; Select[Prime[Range[180]], ok] (* Vincenzo Librandi, Sep 11 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(450) | exists(t){x : x in ResidueClassRing(p) | x^3 eq 20}]; // Vincenzo Librandi, Sep 11 2012
CROSSREFS
Sequence in context: A301590 A293194 A162566 * A040049 A092787 A181562
KEYWORD
nonn,easy
AUTHOR
STATUS
approved