n=100
\precision=2*n
x1=floor((sqrt(5)+1)/2 * 10^(2*n))
\precision=n
x2=floor(sqrt(3) * 10^n)
\precision=15
x3=10^n+1
#
0
x1*x2
divres(x1,x2)
isqrt(x3)
gcd(x1,x2)