The central ``BGMW algorithm,'' and the ``invention'' claimed in this patent, is a fast fixed-base multiple-exponent exponentiation algorithm published by Yao in 1976, with two slight improvements published by Knuth in 1981. The large-precomputation variant of the ``BGMW algorithm'' is a small part of an algorithm published by Pippenger in 1976. The subsequent ``Lim-Lee algorithm'' is a slightly larger part of Pippenger's algorithm. I've written an expository paper to set the record straight.