263 is a Prime number because it has only two factors which are itself and one.
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A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 263 is prime.
The 56th prime number is: 263
Yes, it is the 56th prime number.
263 and 269
For 352: 2 and 11 For 1578: 2, 3 and 263
As a number it is: 263,000