Calculate $\gcd(c^a+1,c^b+1)$
56423
gcd of power plus one
18714
$\gcd\left(a+b,\frac{a^p+b^p}{a+b}\right)=1$, or $p$
77064
Proving $\gcd((a+b)^m,(a-b)^m)\le2^m$ for coprime $a,b$ and $m \in \Bbb N$
130112
If $\gcd(a,n) = 1$ and $\gcd(b,n) = 1$, then $\gcd(ab,n) = 1$.
20823
If $\gcd(a,b) = 1$ and $a,b\mid x$ then $ab\mid x$.
73391
Prove that if $\gcd(a,b)=1$, then $\gcd(a^2,b^2)=1$
52546
How can I find the possible values that $\gcd(a+b,a^2+b^2)$ can take, if $\gcd(a,b)=1$
157784
Prove that if $\gcd(ab,c)=1$, then $\gcd(a,c)=1$.
62959
How to find GCD, LCM on a set of numbers
145354
What is $\gcd(0,0)$?
63965
How can I compute the sum of $ {m\over\gcd(m,n)}$?
31895
Prove that if $a$ and $b$ are odd, coprime numbers, then $\gcd(2^a +1, 2^b +1) = 3$
85688
How to show $\gcd(ac, bd) = \gcd(a,d) * \gcd(b,c)$
91506
If $\gcd(a,b) = 1$ then $\gcd(a,a + b) = 1$
105832
prove that if $\gcd(a,b)=1$ then $\gcd(a^2, b^2)=1$
69279
If $\gcd(a,b)=1$ then, $\gcd(a^2,b^2)=1$
63758
$c\mid ab\Rightarrow c\mid \gcd(a,c)\gcd(b,c),\,$ for integers $a, b, c$