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210 is the number whose prime factors are the first four primes unrepeated.
There are infinitely many prime numbers and the product of any four of them will meet the requirements. For example, 11*37*97*983 = 38,807,857
There are 48 prime numbers in a deck of cards.The prime numbers are 2, 3, 5, and 7. There are four suits - that makes 16. The numbers are repeated on the top and bottom of each card - that makes 32. The numbers are repeated in the number of pips on the cards - that makes 48.And you thought I was crazy. :-)>
The next four prime numbers greater than 31 are 37, 41, 43, and 47.
By four prime numbers which are: 2 3 5 and 7