On Common Solutions of Pell Equations x2-210y2=1 and y2-DZ2=4
Let q1,…,qs are diverse odd primes.In this paper,we prove that if D=2q1 … qs(1 ≤ s≤4)then the equations x2-210y2=1 and y2-DZ2=4 have only trivial solutions(x,y,z)=(±29,±2,0),with the exceptions that D=2×3×19×59×3361.