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alexwee123 Group TitleBest ResponseYou've already chosen the best response.0
because there is only one factor for 1 and a prime number requires 2
 2 years ago

mahmit2012 Group TitleBest ResponseYou've already chosen the best response.0
caz many theorem will fail
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
The fundamental theorem of arithmetic states that you can represent any number uniquely as a product of primes If 1 were prime, then a number like 12 can be written as 12 = 2*2*3 12 = 1*2*2*3 12 = 1*1*2*2*3 ...etc so 12 is being represented as a product of primes but it's not unique. So make the representation unique, we exclude 1 from being prime Note: the order of the factors doesn't matter
 2 years ago

ZSpence Group TitleBest ResponseYou've already chosen the best response.0
Beacause its too COOL
 2 years ago

superhelper Group TitleBest ResponseYou've already chosen the best response.1
because nothing can go into it besides itself
 2 years ago

SmoothMath Group TitleBest ResponseYou've already chosen the best response.2
Every prime number has exactly two factors! For example, 2 is prime because it only has factors 1 and 2. 3 only has factors 1 and 3. 5 only has factors 1 and 5. Now, most nonprimes, it's easy to realize, "Oh, okay, it has more than 2 factors." 1 is the unique case where it has fewer than 2 factors. Just 1 =/
 2 years ago

ZSpence Group TitleBest ResponseYou've already chosen the best response.0
THank you (:
 2 years ago
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