It forms part of the Kahun Papyri, which was discovered at El-Lahun (also known as Lahun, Kahun or Il-Lahun) by Flinders Petrie during excavations of a workers' town near the pyramid of the Twelfth Dynasty pharaoh Sesostris II.
[1] The mathematical texts most commented on are usually named: The Lahun papyrus IV.2 reports a 2/n table for odd n, n = 1, ..., 21.
The Rhind Mathematical Papyrus reports an odd n table up to 101.
Multiplication algorithms and scaling factors involved repeated doubling of numbers, and other operations.
Red auxiliary numbers selected divisors of denominators mp that best summed to numerator mn.