What is the real distance of Andromeda galaxy from the earth?

Andromeda galaxy; m 3 1； NGC224, once known as Andromeda Nebula, is located in Andromeda, a spiral galaxy with a huge disk structure. The messier catalog number is M3 1, and the new nebula cluster number is NGC224, with a diameter of 220,000 light years and a distance of 2.54 million light years from the Earth.

Andromeda galaxy looks like a spindle-shaped oval spot in the northeast sky and is one of the most distant celestial bodies visible to the naked eye. It is generally believed that Andromeda galaxy is the largest galaxy in this galaxy group, and its appearance is similar to that of the Milky Way. The members of this galaxy group are Andromeda, Milky Way, Triangle and about 50 small galaxies. According to the improved measurement technology and the data results of recent research.