Studying when $P_n=(p_1\cdot p_2\cdots p_n)+1$ is a square number
93948
Is my proof correct? $p_1p_2p_3\cdots p_n+1)$ cannot be the square of an integer
21457
Prove $\sqrt{2\sqrt{3\sqrt{\cdots\sqrt{n}}}}<3$ by induction.
19588
$n!+1$ being a perfect square
106896
Number of solutions of $x_1+2x_2+\cdots+kx_k=n$?
83753
Why $\,p \cdot (p^{-1} \mod q) + q \cdot (q^{-1} \mod p) = pq + 1$?
74898
$1^n +2^n + \cdots +(p-1)^n \mod p =$?
44790
Find $n$ for which $\frac{n(n+1)}{2}$ is perfect square
145752
Aut $\mathbb Z_p\simeq \mathbb Z_{p-1}$
110262
Finding a closed formula for $1\cdot2\cdot3\cdots k +\dots + n(n+1)(n+2)\cdots(k+n-1)$
90102
How to prove that $p-1$ is squarefree infinitely often?
54355
$1+x+\ldots+x^n$ perfect square
70620
From $n=2$ to $n$-ary Euclid lemma $\ p\mid a_1\cdots a_n\Rightarrow\ p\mid a_1\,$ or $\,\cdots\, p\mid a_n$
101057
Show that $1^{p-1} + 2^{p-1} +\ldots + (p-1)^{p-1} \equiv -1 \mod p$
53244
Prove that $p \in \mathbb{R}[x]$ can be represented as a sum of squares of polynomials from $\mathbb{R}[x]$
72389
Positive integer $n$ such that $2n+1$ , $3n+1$ are both perfect squares
153869
Under what $p$, $-1$ is a square in $\mathbf F_p$?
96039
Why is $\frac {1\cdot2\cdot3\cdot...\cdot n}{(n+1)(n+2)...(2n)}\le \frac 1 {n+1}$