1 x 289 = 289
17 x 17
289/x=96r1 x = 289/96r1
578
289 = 17 x 17
1 x 289, 17 x 17
289 x 1 17 x 17
289/3 = 96 remainder 1 Therefore, x = 3.
225 = 15 x 15 256 = 16 x 16 289 = 17 x 17
2893 = 289 x 289 x 289 = 24137569
x = 15 - N.
Just one, used twice: 17 x 17 = 289