233 239 241 251 257.
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233 239 241 251 257.
211 223 227 229 233 239 241 251 257.
No, prime numbers must have exactly two divisors which result in an integer dividend; these numbers are one (1) and the number itself. Since 260 is an even number it has two (2) as a such a divisor. Thus, it has more than two and is not prime.
230 or 260
There are four of them, which are 256, 258, 259 and 260.