Answer:
309^2 - 147^2 is the same as 95,481 - 21,609.
95,481 - 21,609 = 73,872.
Prime Factors of 73,872 =2, 2, 2, 2, 3, 3, 3, 3, 3, 19
Which is the same as = 24 x 35 x 19
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