1 and 2
When added together 1 + 2 = 3
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There are only two prime numbers that are consecutive numbers, 2 and 3. Their product is 2 x 3 = 6. The first prime numbers are 2, 3, 5, and 7 and the only two consecutive prime numbers whose product is a single digit are 2 and 3. (The next two consecutive prime numbers, 3 and 5, have a two-digit product.)
2 and 3
14 + 15 + 16
2 and 3 are prime numbers.
1003