1 is not a Prime number because every number is divisible by 1, including itself. 0 is not a prime number because the division by 0 will not produce any real numbers.
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Nope.... 1 is a factor of every prime number !
The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.
No. The number 1 is not their only common factor.
a prime number