Generate a value

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Where does the randomness come from?

Picking a number "at random" with a software PRNG still means running a deterministic formula; given the same seed, it produces the same sequence every time. That's fine for many uses, but not when unpredictability itself is the point.

This generator maps physical entropy from Galactropy's pool onto your requested range using rejection sampling, so the result isn't biased toward any part of the range and isn't derived from a predictable seed.

⚠ Cryptographic notice

For statistically rigorous work (scientific sampling, draws with real money on the line), independently verify the output distribution rather than trusting any single generator, including this one.

Frequently asked questions (FAQ)

Can the same number come up twice in a row?

Yes: each draw is independent, exactly like a fair physical process (a dice roll or coin flip), so repeats are expected at the normal statistical rate for the chosen range.

What's the maximum range I can request?

Any integer range fitting within standard 64-bit bounds is supported; very large ranges just consume more entropy per draw.