2 5 3 7 x 1 July 8, 2019 16 32 64 128 2 3 5 7 x 13 2 3 5 7 11 x 17 2 3 x 5 7 x 1 6 7x 2 3 5 x 1 ) 2 5 x 1 3 x 7 8 3 4x 2 5 x 7 10 (- 2 x (- 5 3 4 7 x (+ 4 1 2 5 x 12 35 3 7 13 2 5 7 x 3 9 7 x 2 )+ 5 3 2x 1 )+ 1 13 21 x 2 5 7 3 14 1 5 x 2 3 )= 7 15 2 3 1 7 x 5 6 1 12 2 3 x 5 8 7 12 2 x 5 )- 3 x 7 )= 14