Is $3^{2015}-2^{2015}$ a prime?
138751
Check if the number $3^{2015} - 2^{2015}$ is prime
69582
Is it true that: $a+bi$ is prime in $\mathbb{Z}[i]$ if and only if $a^2+b^2$ is prime in $\mathbb{Z}$
146725
Are numbers of the form $n^2+n+17$ always prime
63702
There is a prime between $n$ and $n^2$, without Bertrand
2802
If $2^n+1$ is prime, why must $n$ be a power of $2$?
124869
Prime factor of $A=14^7+14^2+1$
42885
Fermat primes relation to $2^n+1$
15915
For any prime $p > 3$, why is $p^2-1$ always divisible by 24?
37315
not both $2^n-1,2^n+1$ can be prime.
75733
Divisibility of prime numbers
78416
Show that $7$ divides $a^{15}-a^3$ for any integer $a$
112120
Find all primes of the form $2^{2^n} + 5$ for a nonnegative integer n
45793
How do you prove a number is prime?
77206
C - determine if a number is prime
29572
Proof that $2^n-1$ does not always generate primes when primes are plugged in for $n$?
118629
$p,q$ odd primes, $q\mid a^p-1\Rightarrow q\mid a-1$ or $\,2p\mid q-1$
153862
A question about a primitive root mod $p=2^{2^k}+1$, where $p$ is prime.