Are $n^2+n+41$ primes when $0\leq n \leq 39$?
55060
Prove that $n^2+n+41$ is prime for $n<40$
75516
Relatively Prime Numbers and Number of Divisors of n
16459
Limit of ratios of numbers with $m$ factors and primes
18302
List the primes for which the following system of linear equations DOES NOT have a solution in $\mathbb{Z}_p$
126471
At least one prime between $\sqrt{n}$ and $n$?
146725
Are numbers of the form $n^2+n+17$ always prime
105444
Possible values of prime gaps
8710
Bounds for $n$-th prime
50663
prove or disprove: For a prime number p, there is a positive integer n such that $p+1 $= $n^2$ if and only if $ p = 3.$
27069
sum of all positive integers less than $n$ and relatively prime to $n$
41925
What is the distribution of primes modulo $n$?
92483
Without using prime factorization, find a prime factor of $\frac{(3^{41} -1)}{2}$
34617
Number Theory: which primes are a sum of two squares?
22441
Does the sum of reciprocals of primes converge?
6700
An Olympiad problem in prime numbers :can we proof that "n" is prime in this case "
140006
Are there infinitely many primes and non primes of the form $10^n+1$?
44857
Why the $(n+1)$th prime number cannot exceed the smallest prime divisor of $p_1\dotsc p_n + 1$