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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 and 1986, 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 ow

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  • Harry L. Nelson (en)
  • ハリー・ネルソン (ja)
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  • ハリー・ネルソン（Harry L. Nelson、1932年1月8日 - 、カンザス州トピカ生まれ）はアメリカのコンピュータプログラマ、数学者、編集者、パズルコレクター。1991年に引退するまで、ローレンス・リバモア国立研究所の研究員。Journal of Recreational Mathematicsの編集長も務めていた。 * 1953年、ハーバード大学数学科を卒業。その後、アメリカ陸軍に2年間従軍する。 * 1957年、カンザス大学で修士号（M.A.）を取得。1979年、当時世界最大の素数（メルセンヌ数）244497-1を発見。ギネスブックに掲載された。 * 1981年、アルキメデスの「家畜の問題」をCray-1コンピュータを使って206,545桁の全解を得た。 * 1983年、Robert Hyattと共に開発したプログラム「Cray Blitz」を使い、世界コンピュータチェス選手権で優勝。 パズル作家芦ヶ原伸之との親交でも知られる。1983年、芦ヶ原の考案した難解なパズル「ノナ」をCray-1を使って全解を得たことがある。 (ja)
  • 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 and 1986, 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 ow (en)
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  • 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 and 1986, 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. (en)
  • ハリー・ネルソン（Harry L. Nelson、1932年1月8日 - 、カンザス州トピカ生まれ）はアメリカのコンピュータプログラマ、数学者、編集者、パズルコレクター。1991年に引退するまで、ローレンス・リバモア国立研究所の研究員。Journal of Recreational Mathematicsの編集長も務めていた。 * 1953年、ハーバード大学数学科を卒業。その後、アメリカ陸軍に2年間従軍する。 * 1957年、カンザス大学で修士号（M.A.）を取得。1979年、当時世界最大の素数（メルセンヌ数）244497-1を発見。ギネスブックに掲載された。 * 1981年、アルキメデスの「家畜の問題」をCray-1コンピュータを使って206,545桁の全解を得た。 * 1983年、Robert Hyattと共に開発したプログラム「Cray Blitz」を使い、世界コンピュータチェス選手権で優勝。 パズル作家芦ヶ原伸之との親交でも知られる。1983年、芦ヶ原の考案した難解なパズル「ノナ」をCray-1を使って全解を得たことがある。 (ja)
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