MathDB
2016 LMT Individual #7

Source:

April 10, 2016

Problem Statement

Compute the product of the three smallest prime factors of 21!⋅14!+21!⋅21+14!⋅14+21⋅14.21!\cdot 14!+21!\cdot 21+14!\cdot 14+21\cdot 14.
Proposed by Daniel Liu
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