RandomPrime

RandomPrime[{imin, imax}] gives a pseudorandom prime in the range imin to imax.

RandomPrime[imax] gives a random prime from 2 to imax.

RandomPrime[range, n] gives a list of n random primes.

Examples

Random prime up to 100:

RandomPrime[100]
(* 47 *)

Random primes in a range:

RandomPrime[{100, 200}, 5]
(* {103, 179, 127, 191, 157} *)

Please visit the official Wolfram Language Reference for more details.