What is the greatest prime factor of 3^8 - 1?	Select the correct option
A) 29 B) 31 C) 37 D) 41 E) 43
3^8-1 = (3^4-1)(3^4+1) = 80*82 = 8*10*2*41   The answer is 41.
<result>D</result>
What is the greatest prime factor of 3^8 - 1?