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Harry L. Nelson : ウィキペディア英語版 | Harry L. Nelson Harry Lewis Nelson (born January 8, 1932) is an American mathematician and computer programmer. He was a member of the team that won the World Computer Chess Championship in 1983〔Bogner, Harold, "The New Champion", in Chess Life, vol. 39, no 2, February 1984.〕 and 1986,〔Robert M. Hyatt, Harry L. Nelson, Albert E. Gower, "Cray Blitz", in Computers, Chess, and Cognition, Springer-Verlag, 1990, (111-130).〕 and was a co-discoverer of the 27th Mersenne prime in 1979 (at the time, the largest known prime number). He also served as editor of the ''Journal of Recreational Mathematics'' for five years. Most of his professional career was spent at Lawrence Livermore National Laboratory where he worked with some of the earliest supercomputers. He was particularly noted as one of the world's foremost experts in writing optimized assembly language routines for the Cray-1 and Cray X-MP computers. Nelson has had a lifelong interest in puzzles of all types, and since his retirement in 1991 he has devoted his time to his own MiniMax Game Company, a small venture that helps puzzle inventors to develop and market their products. In 1994, Nelson donated his correspondence from his days as editor of the ''Journal of Recreational Mathematics'' to the University of Calgary Library as part of the Eugène Strens Recreational Mathematics Special Collection. ==Biography==
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