Why is -1 not a prime number?
62061
Do we have negative prime numbers?
151930
What does it mean by $t=-1$?
97952
Square root of 1 is (not) -1
81875
why is $\sqrt{-1} = i$ and not $\pm i$?
102064
Prime number between $n$ and $n!+1$
126945
checking if a number is a prime
73515
Primes Number Theory
45793
How do you prove a number is prime?
22397
Is 0.9999... equal to -1?
8061
Why must the base of a logarithm be a positive real number not equal to 1?
123544
Show that $n = 3^{100} + 2$ is not a prime number.
65511
Proving the following false: $f(x)=2x+1$ produces a prime number if and only if x is prime
61899
Prove that the language $\{bin(p) \mid p\ \text{is prime}\}$ is not regular (prime numbers)
103323
Finding a primitive root of a prime number
35077
Why does "the probability of a random natural number being prime" make no sense?
143772
How can I algebraically prove that $2^n - 1$ is not always prime?
108265
Alternate definition of prime number