Any power of 3 from the first upwards (31, 32, 33, 34, 35, ...).
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3,9,27,81,243,729
The two successive prime numbers are 2 and 3. 1 is not a prime number because it has only one factor, while prime numbers have two positive integer factors.
3, 9, 27, 81, 243, 729
3 and 11 are both prime numbers. The only factor they have in common is 1.
All of them are prime numbers