Find all integers n > 1 so that n, n + 2, n + 4 are all prime
75206
If $a$, $a+2$ and $a+4$ are prime numbers then, how can one prove that there is only one solution for $a$?
123033
Showing a number $n$ is prime if $(n-2)! \equiv 1 \pmod n$
146512
Prove that for every prime number $p>3$, $4p^2+1$ can be written as the sum of three square numbers
81250
Infinitude of prime numbers
89066
Find all integers less than $m$ that are relatively prime to it
142008
Find all natural numbers $n$ such that ${(n+1)}^{1/2}-{(n-1)}^{1/2}$ is rational
136856
Diophantine equation with a prime number
26336
Prove that $n(n^2 - 1)(n + 2)$ is divisible by $4$ for any integer $n$
84879
Solving infinite sums with primes.
27069
sum of all positive integers less than $n$ and relatively prime to $n$
126471
At least one prime between $\sqrt{n}$ and $n$?
9787
Primitive roots modulo primes congruent to n!
1189
Using Fermats prime numbers to prove that there is infinitely many prime numbers
42885
Fermat primes relation to $2^n+1$
34588
Number Theory: $p!+p=n^2$, $p$ = prime
91451
find all positive integer $m,n$
39915
Let $n$ be an integer such that if $d | n$ then $d + 1 | n + 1.$ Show that $n$ is a prime number