Is the 62nd power of 2 prime

No. a prime number is a number that has only 1 and two divisors of itself in a natural number greater than 1, and 2 is not a prime number
2 to the 62nd power has a divisor 2, so it is not prime

Is the power of 2 + 1 prime

No, I saw it before
The 1984 power of 2 + 1 can be divided by two numbers (except 1 and itself),
But now I forget. If you can read more math books, I believe you will find the answer one day

a. B and C are three prime numbers within 100, which satisfy a + B = C______ Group

The formulas are: 2 + 3 = 5; 2 + 5 = 7; 2 + 11 = 13; 2 + 17 = 19; 2 + 29 = 31; 2 + 41 = 43; 2 + 59 = 61; 2 + 71 = 73; there are 8 groups

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