The largest prime factor of (2⁴)²-1 is

A 3

B 5

C 17

D 19

Correct Answer: Option C

(2⁴)²-1
=(2⁴)²-1²
=(2⁴ +1) (2⁴ -1)
=(16+1)(16-1)
=17×15
=17× 5×3
বৃহত্তম সংখ্যা 17