The dwarf planet Pluto is the planet with a year 248 earth years long.
The dwarf planet Haumea is the planet with a year 280 earth years long.
The dwarf planet Makemake is the planet with a year 310 earth years long.
It depends which planet you mean.
No not by a long shot. Jupiter is About 320 times the size of earth and is the largest planet in our solar system.
Mars
0.2408 of an Earth year.
Mars.
It is 84 Earth years
neptune
88 (Earth) days.
Uranus.