# Pages that link to "Congruence condition for minus one to be a quadratic residue"

The following pages link to **Congruence condition for minus one to be a quadratic residue**:

- Every integer that is not a perfect square is a quadratic nonresidue for infinitely many primes (← links)
- Safe prime has plus or minus two as a primitive root (← links)
- Congruence condition for two to be a quadratic residue (← links)
- Dirichlet's theorem for modulus eight (← links)
- Dirichlet's theorem for modulus four (← links)
- Euler's criterion (← links)