Yes because it has only 2 factors which are itself and one
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283 has only 2 factors, 1 and itself. It is a prime number.
1, 283 (283 is a prime number).
271 277 281 283 293.
1 and 283, it's prime
If one of the two numbers is 2, the sum of two prime numbers may sometimes be a prime number. Examples of this are 2 + 11 = 13, 2 + 521 = 523, 2 + 281 = 283. There are an infinite number of similar examples where the sum of 2 plus a prime is another prime. However if neither number is 2, then the sum of two prime numbers is always an even number greater than 2 and therefore composite.