2 7 12 5 6 July 8, 2019 16 32 64 128 2 3 x 5 6 =- 7 12 7 12 5 2 x 1 6 2 3 5 6 and 7 12 Gmstb 2 5 12 st 7 62 5 6s 2 9 =- 7 12 2 x 7 12 5 6