Seven boxes F, G, H, I, J, K and L, are placed one above the other. The bottommost box is numbered as 1 and the topmost box is numbered as 7. Both G and K are placed at prime numbered position. Three boxes are placed between G and K. Two boxes are placed between K and J. F is placed just below K. Two boxes are placed between F and H. I is placed above F. Which box is placed at bottommost position?