Quaternions is an option for PrimeQ which specifies whether factorization should be done over the quaternions.

RightAssociates[q] gives a list of the 24 right associates of the quaternion q.

RightGCD[a, b] gives the greatest common right divisor of the quaternions a and b.

ScalarQ[q] gives True if q is a real numeric quantity and False otherwise.

ToQuaternion[q] transforms q into a Quaternion object if possible.

UnitQuaternionQ[q] gives True if q is a unit quaternion and False otherwise.

UnitQuaternions gives a list of the 24 units in the ring of integer quaternions.

Atto is the SI unit prefix denoting 10 -18.

Bit is the fundamental unit of information.

Centi is the SI unit prefix denoting 10 -2.