... Schroeder, Number Theory in Science and Communication, 2nd ed., Springer-Verlag, 1986. D. Shanks, Solved and Unsolved Problems in Number Theory, 3rd ed., Chelsea Publ. Co., 1985. W. Sierpinski, ... volumes, Chelsea, 1952. R. K. Guy, Unsolved Problems in Number Theory, Springer-Verlag, 1982. G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers, 5th ed., Oxford University ... second-to-last remainder, obtaining a new quotient and remainder. When we finally obtain a remainder that divides the previous remainder, we are done: that final nonzero remainder is the greatest...