Pépin's Test
A test for the Primality of Fermat Numbers 
, with 
and 
. Then the two following conditions are equivalent:
- 1.
is Prime and 
, where 
is the Jacobi Symbol, - 2.
.
is usually taken as 3 as a first test.See also Fermat Number, Pépin's Theorem
References
Ribenboim, P. The Little Book of Big Primes. New York: Springer-Verlag, p. 62, 1991. Shanks, D. Solved and Unsolved Problems in Number Theory, 4th ed. New York: Chelsea, pp. 119-120, 1993.
- Epicycloid
- Epicycloid--1-Cusped
- Epicycloid--2-Cusped
- Epicycloid Evolute
- Epicycloid Involute
- Epicycloid Pedal Curve
- Epicycloid Radial Curve
- Epimenides Paradox
- Epimorphism
- Epispiral
- Epispiral Inverse Curve
- Epitrochoid
- Epitrochoid Evolute
- Epsilon
- Epsilon-Neighborhood
- Epstein Zeta Function
- Equal
- Equal by Definition
- Equal Detour Point
- Equality
- Equally Likely Outcomes Distribution
- Equal Parallelians Point
- Equiaffinity
- Equiangular Spiral
- Equianharmonic Case