80 = 2 x 2 x 2 x 2 x 5
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The prime numbers (factors) of 80 are: 2 and 5
Prime numbers between 71 to 80 = 73 and 79 Therefore there are 2 prime numbers between 71 to 80.
80 has a prime factorization of 2 X 2 X 2 X 2 X 5. You can group any two, three or four of them and multiply them by the rest.
The numbers 83, 89 and 97 are prime.
The only number that equals 80 is 80, and it's not a prime number.