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Find the largest prime factor of  451^2 - 137^2 without using a calculator.

 Feb 2, 2018
 #1
avatar+111331 
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451^2  -  137^2  =

 

(451 + 137)(451 - 137)

 

(588)(314)

 

(294)(2)(157)(2)

 

So........the largest prime factor is  157

 

 

cool cool cool

 Feb 2, 2018

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