Greatest Common Divisor (Algorithm 237 [A1]) CACM August, 1964 Peck, J. E. L. CA640808 JB March 9, 1978 7:17 PM 1022 5 1022 1022 5 1022 1022 5 1022 2031 5 1022 1022 6 1022 450 6 1022