# primality

## Alexa's Conjecture on Primality ★★

Author(s): Alexa

**Definition**Let be the unique integer (with respect to a fixed ) such that

**Conjecture**A natural number is a prime iff

Keywords: primality

## Giuga's Conjecture on Primality ★★

Author(s): Giuseppe Giuga

**Conjecture**is a prime iff

Keywords: primality