Is 2 Prime?
Let's first look at primes other than 2:
(I'm going to use I as a tally mark)
3 is II I*
5 is II II I*
7 is II II II I*
.
.
.
nth prime is pairs of I with one unpaired I left over [*]
Now take a look at 2.
2 is II [no unpaired 1 left over]
2 breaks the pattern of primes as odd numbers.
(I'm going to use I as a tally mark)
3 is II I*
5 is II II I*
7 is II II II I*
.
.
.
nth prime is pairs of I with one unpaired I left over [*]
Now take a look at 2.
2 is II [no unpaired 1 left over]
2 breaks the pattern of primes as odd numbers.
Comments (1)
Yes, 2 is prime. The definition of a prime number is a natural number which is only divisible by itself and one. The divisors of 2 are 2 (itself) and 1. Therefore 2 is prime.
Going to close the thread.