Question

Sorry guys, rebumping -


Find the greatest prime factor of 2^20-1

Answer 1

Difference of 2 squares
(2^10 + 1)(2^10 = 1)
(1024 + 1)(1024 - 1)
(1025)((1023)
(5 * 205)(3 * 341)
(5 * 5 * 41)(3 * 341)
(5 * 5 * 41)(3 * 11 * 31)

I would say 41

Answer 2

Thanks! thats what i got too!