2 x 2 = 4
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210 is the number whose prime factors are the first four primes unrepeated.
No
The largest four-digit prime number is 9973.
No prime number can be divided by 4 exactly.
Fourteen is not a prime number since it is divisible by 2 and 7 and not just 1 and 14. Four is not a prime number, either since it is divisible by 2 and not just 4 and 1.