A 2 3 7 July 8, 2019 16 32 64 128 A 2 3 7 9 A 2 3 7 8 A 2 7a 3 A 3 2 7 6 A 2 3 5 7 A 2 3 5 7 11 A 1 2 3 7 A 2 3 4 7 A 2 b 3 7 A 2 3 b 4 7 Find a 2 7 3