Zero, right?
But it’s complicated again! Is it prime or composite?
I was having a look-around on Math Stack Exchange Is zero a prime number? and it was absolutely confusing. Give it a read!
It’s not prime, so it should b —
(Screech sound)
Wait. Who said it was PRIME? Not me. Let’s prove it!
If zero was prime, then it has no divisors. Let’s see, it has divisors of 0, 1, 2 (2*0=0), 3, 4, 5, 6, 7, 8, 9, 10, blah blah blah, so it’s not prime!
So it’s … composite?
Maybe? I mean we just proved it’s not prime, so it should be composite, right?
There’s a program on Khan Academy called Level 10: Fermat Primality Test and it says composite!
Q.E.D.
P.S. Comment below on what you think 0 is.
Math we NEED to know 
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I guess I’ll consider it.
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