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Wikipedia definition
1. Power of twoIn mathematics, a power of two means a number of the form 2 where n is an integer, i.e. the result of exponentiation with as base the number two and as exponent the integer n. In a context where only integers are considered, n is restricted to non-negative values, so we have 1, 2, and 2 multiplied by itself a certain number of times. Because two is the base of the binary numeral system, powers of two are common in computer science.
Read “Power of two” on English Wikipedia
Read “2の冪” on Japanese Wikipedia
Read “Power of two” on DBpedia

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