For all positive even integers n, nj represents the product of all even integers from 2 to n, inclusive. For example, 12j=12*10*8*6*4*2. What is the greatest prime factor of 20j+22j?
For all positive even integers n, nj represents the product of all even integers from 2 to n, inclusive. For example, 12j=12*10*8*6*4*2. What is the greatest prime factor of 20j+22j?