1. Determine whether the number $N=7 \times 9 \times 13+2020 \times 2018 \times 2014$ is prime or composite.
Answer: Composite.

Solution: Note that 7+2020=9+2018=13+2014=2027. Therefore, $N \equiv 7 \times 9 \times 13 + (-7) \times (-9) \times (-13) = 0 \pmod{2027}$