37 + 43 = 80
2 + 3 + 5 + 23 + 47 = 80
2 + 7 + 11 + 17 + 43 = 80
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There is no prime number between 60 and 80 that has a consecutive sum. The prime numbers between 60 and 80 are 61, 67, and 71, but none of them have consecutive sums.
the answer is clearly 83,89 and 97.
The prime numbers (factors) of 80 are: 2 and 5
The largest prime less than 20 is 19. The largest prime over 60 is 61. The sum of these two numbers is 80.