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'''Novemtrigintillion''' is a very [[large number]]. It's ten to the power of 120 or 10<sup>120</sup>. | '''Novemtrigintillion''' is a very [[large number]]. It's ten to the power of 120 or 10<sup>120</sup>. | ||
| − | + | ==Shannon number== | |
| + | One novemtriginillion is known as the '''shannon number. The shannon number is an estimation of the [[game-tree complexity]] of [[chess]]. It was first calculated by [[Claude Shannon]], the father of [[information theory]]. According to him, on average, 40 moves are played in a chess game and each player chooses one move among 30 (but in fact, there may be as few as zero -in the case of [[checkmate]] or [[stalemate]]- or as many as [http://www.softdecc.com/pdb/search.pdb?expression=PROBID='P0004126' 218]). Therefore, (30×30)<sup>40</sup>, [[List_of_Latin_phrases#I|i.e.]] 900<sup>40</sup> chess games are possible. This number is about 10<sup>120</sup>, as the solution of the equation 900<sup>40</sup>=10<sup>x</sup> is x=40×''log'' 900. | ||
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| + | The [[game-tree complexity]] of chess is now evaluated at approximately 10<sup>123</sup> (the number of legal positions in the game of [[chess]] is estimated to be between 10<sup>43</sup> and 10<sup>50</sup>). As a comparison, the number of [[atoms]] in the [[Universe]], to which it is often compared, is estimated to be between 4×10<sup>78</sup> and 6×10<sup>79</sup>. | ||
== See also == | == See also == | ||
Latest revision as of 00:37, 7 March 2011
Novemtrigintillion is a very large number. It's ten to the power of 120 or 10120.
Shannon number[edit]
One novemtriginillion is known as the shannon number. The shannon number is an estimation of the game-tree complexity of chess. It was first calculated by Claude Shannon, the father of information theory. According to him, on average, 40 moves are played in a chess game and each player chooses one move among 30 (but in fact, there may be as few as zero -in the case of checkmate or stalemate- or as many as 218). Therefore, (30×30)40, i.e. 90040 chess games are possible. This number is about 10120, as the solution of the equation 90040=10x is x=40×log 900.
The game-tree complexity of chess is now evaluated at approximately 10123 (the number of legal positions in the game of chess is estimated to be between 1043 and 1050). As a comparison, the number of atoms in the Universe, to which it is often compared, is estimated to be between 4×1078 and 6×1079.
