(2-1)(2+1)(2^2+1)(2^4)...(2^64+1)+1=?

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(2-1)(2+1)(2^2+1)(2^4)...(2^64+1)+1=?
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(2-1)(2+1)(2^2+1)(2^4)...(2^64+1)+1=?
(2-1)(2+1)(2^2+1)(2^4)...(2^64+1)+1=?

(2-1)(2+1)(2^2+1)(2^4)...(2^64+1)+1=?
(2-1)(2+1)(2^2+1)(2^4)...(2^64+1) + 1
=(2² - 1)(2² + 1)(2⁴+ 1) .(2^64+1) + 1
= .
=(2^64 - 1) (2^64+1) + 1
=(2^128 - 1) + 1
= 2^128