- 1 - Wikipedia
In mathematics, 1 is the multiplicative identity, meaning that any number multiplied by 1 equals the same number 1 is by convention not considered a prime number
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- 1 (number) - Simple English Wikipedia, the free encyclopedia
Pronunciation of the number 1 One (1) is the first natural number, followed by two The Roman numeral for one is I In mathematics, the number one is the multiplicative identity [1] It is also the only number for which these special facts are true: Any number multiplied by one equals that number: For example,
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- 1 (number) | Math Wiki | Fandom
1 is the only odd practical number 1 can't be used as the base nor the argument of logarithms
- 1 -- from Wolfram MathWorld
Although the number 1 used to be considered a prime number, it requires special treatment in so many definitions and applications involving primes greater than or equal to 2 that it is usually placed into a class of its own (Wells 1986, p 31)
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