It is: 1.7
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71
The smallest four prime numbers are 2, 3, 5, 7, and their sum happens to be a prime.
number of prime numbers in 71 to 80 = 3prime numbers in 71 to 80 = 71, 73, & 79
71 is a prime number.
The smallest, positive 4-digit multiple of 17 is 1,003.