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Number Theory Level 5

Find the last 5 non-zero digits of 2017 ! 2017! .

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Notation : ! ! denotes the factorial notation. For example, 8 ! = 1 × 2 × 3 × ⋯ × 8 8! = 1\times2\times3\times\cdots\times8 .


The answer is 15968.

Samara Simha Reddy by Samara Simha Reddy , 22, India

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