Could be this : $7131372917538397234773191167617941438959$ written as $x^{2}+y^{2}$ with $x, y$ integers?
119582
How to select the right modulus to prove that there do not exist integers $a$ and $b$ such that $a^2+b^2=1234567$?
87029
Solve $y^2=x^3-4$ in $x,y\in \mathbb{Z}$
148906
Finding integers $m,n$ such that $(m-n)^2=4mn/(m+n-1)$
86219
Integers of the form $x^2-ny^2$
155363
Find all integers $(x, y)$ such that $1 + 2^x + 2^{2x + 1} = y^2$
9156
Can someone explain this: 0.2 + 0.1 = 0.30000000000000004?
4559
How many ways can $133$ be written as sum of only $1s$ and $2s$
34742
In my calculator why does $\sqrt4 -2=-8.1648465955514287168521180122928e-39?$
47792
Integer coefficient polynomial - values as powers of 2
39135
Representation of integers by ternary quadratic form $x^2+y^2-z^2$
121122
Calculate $2^{5104} \bmod 10$ using mental arithmetic
55984
How can I find the answer to $\varphi(2^{400} + 2)$?
54441
Last two digits of $3^{400}$
131625
Expressing an integer as the sum of three squares
120092
Express the complex numbers given in Problem in the form $a+ib$
18761
Given that $x^y=y^x$, what could $x$ and $y$ be?
15725
$2017$ as the sum of two squares