RNG (Random Number Generator)
An RNG, or random number generator, is the algorithm that produces the unpredictable outcomes behind every slot spin, card deal and virtual game result.
Online games use a pseudo-random generator seeded from a high-entropy source, producing sequences that are statistically indistinguishable from random and impossible to predict from prior outputs. The game maths then maps those numbers onto reel positions, cards or wheel segments.
Independent testing laboratories certify both the generator and the paytable implementation, confirming the distribution is uniform, the seeding cannot be manipulated and the published RTP matches the model. Certification is a licence requirement in every regulated market.
Live dealer games do not use an RNG for the result — the outcome comes from real cards, dice or a physical wheel, captured by optical recognition.
- Outcome is determined at the moment of the bet, not during the animation
- Certified by independent labs before a game may be offered
- Live dealer results come from physical equipment, not an RNG
- Provably fair games publish a verifiable seed instead
Frequently asked questions
Is an RNG truly random?
It is pseudo-random: deterministic given the seed, but seeded from high-entropy sources and statistically indistinguishable from randomness, which certification verifies.
Can a slot be made to pay less at a certain time of day?
Not in a certified game. The generator has no notion of time, player or balance; every round is drawn from the same distribution.