OFFSET
1,1
COMMENTS
LINKS
MATHEMATICA
ok[p_]:= Reduce[Mod[x^19 - 2, p] == 0, x, Integers] =!= False; Select[Prime[Range[200]], ok] (* Vincenzo Librandi, Sep 13 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(300) | exists(t){x : x in ResidueClassRing(p) | x^19 eq 2}]; // Vincenzo Librandi, Sep 13 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved