Primeshard
0:00.0
A prime p is a quadratic residue mod another prime q iff q is a quadratic residue mod p, UNLESS both are ≡3(mod4), in which case there's a sign change. This is the statement of:
A prime p is a quadratic residue mod another prime q iff q is a quadratic residue mod p, UNLESS both are ≡3(mod4), in which case there's a sign change. This is the statement of: