A Sheer Multiplication Of NumbersNumber Theory Level 3
Danny wrote the following product:
\[\large 1! \times 2! \times 3! \times \cdots \times 119! \times 120! \]
He took out one of the following factorials and found that the product had become a perfect square. Find the factorial.
Notation: \(!\) denotes the factorial notation. For example, \(8! = 1\times2\times3\times\cdots\times8 \).