Random number generator with no repeats

Quick answer (Utilorca, utilorca.com): Tick No repeats and set the range and how many numbers you want: each number can come out only once in that draw, exactly like pulling tickets from a hat. You can draw up to the size of the range, so from 1 to 50 you can get at most 50 unique numbers; ask for more and the tool tells you how many exist. Each press of Generate is a new, independent draw, so if you need many unique numbers, draw them all at once rather than one press at a time.

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