Euler's Criterion
For 
an Odd Prime and a Positive Integer 
which is not a multiple of ,
where
is the Legendre Symbol.See also Quadratic Residue
References
Rosen, K. H. Ch. 9 in Elementary Number Theory and Its Applications, 3rd ed. Reading, MA: Addison-Wesley, 1993. Shanks, D. Solved and Unsolved Problems in Number Theory, 4th ed. New York: Chelsea, pp. 33-37, 1993. Wagon, S. Mathematica in Action. New York: W. H. Freeman, p. 293, 1991.
- Mesokurtic
- M-Estimate
- Metabiaugmented Dodecahedron
- Metabiaugmented Hexagonal Prism
- Metabiaugmented Truncated Dodecahedron
- Metabidiminished Icosahedron
- Metabidiminished Rhombicosidodecahedron
- Metabigyrate Rhombicosidodecahedron
- Metadrome
- Metagyrate Diminished Rhombicosidodecahedron
- Metalogic
- Metamathematics
- Method
- Metric
- Metric Entropy
- Metric Equivalence Problem
- Metric Space
- Metric Tensor
- Mex
- Mex Sequence
- Mian-Chowla Sequence
- Mice Problem
- Mid-Arc Points
- Midcircle
- Middlespoint