Korselt's Criterion
Divides 
for all Integers 
Iff is Squarefree and
for all Prime Divisors 
of . Carmichael Numberssatisfy this Criterion.
References
Borwein, D.; Borwein, J. M.; Borwein, P. B.; and Girgensohn, R. ``Giuga's Conjecture on Primality.'' Amer. Math. Monthly 103, 40-50, 1996.
- Greatest Common Denominator
- Greatest Common Divisor
- Greatest Common Divisor Theorem
- Greatest Common Factor
- Greatest Integer Function
- Greatest Lower Bound
- Greatest Prime Factor
- Great Hexacronic Icositetrahedron
- Great Hexagonal Hexecontahedron
- Great Icosacronic Hexecontahedron
- Great Icosahedron
- Great Icosahedron-Great Stellated Dodecahedron Compound
- Great Icosicosidodecahedron
- Great Icosidodecahedron
- Great Icosihemidodecacron
- Great Icosihemidodecahedron
- Great Inverted Pentagonal Hexecontahedron
- Great Inverted Retrosnub Icosidodecahedron
- Great Inverted Snub Icosidodecahedron
- Great Pentagonal Hexecontahedron
- Great Pentagrammic Hexecontahedron
- Great Pentakis Dodecahedron
- Great Quasitruncated Icosidodecahedron
- Great Retrosnub Icosidodecahedron
- Great Rhombicosidodecahedron (Archimedean)