What is RNG and How Does It Work in Slots?

Have you ever wondered how real money jackpot slots decide when to hit the jackpot or when to leave you just one symbol short? It all comes down to RNG, which stands for Random Number Generator. RNG runs quietly in the background of every slot game, making sure the results are completely random and fair. Whether you're playing at a real casino or on your favourite online platform, RNG is what keeps the game honest. In this article, we'll break down what RNG really is, how it works in slots and other essential aspects you should know.

⚠️ Disclaimer: This article does not guarantee any specific results in gambling. Please gamble responsibly. Also, remember that slot outcomes are determined by certified RNG software to ensure fairness, but winning is always based on chance.

What is RNG? 

RNG (Random Number Generator) is a technology used in the best online slots to create random and unpredictable bet outcomes. RNG is also known as a computer algorithm that constantly generates random numbers, even when no one is playing. The moment you press the spin button on a slot machine, the RNG instantly selects a number, which then determines the position of the reels and the result of your spin.

There are two types of Random Number Generators, which are highlighted below:

• True RNG (TRNG): This uses natural, unpredictable processes to generate randomness.
• Pseudo-RNG (PRNG): This uses mathematical formulas and a seed number to simulate randomness. Most slot machines use this type because it's faster and easier to control and test for fairness.

The Role of RNG in Slot Machines 

Every time you press the spin button, the RNG instantly picks a random number. This number corresponds to a specific combination of symbols on the reels. The result you see, whether it's a win or a loss, is determined at that exact moment, not influenced by previous spins or how long you've been playing.

Here's why RNG is so vital in slots:

• Fair play: In research conducted by the UK Gambling Commission, it was decided that gamblers were significantly more likely to agree that gambling is conducted fairly and can be trusted than non-gamblers (39 percent versus 27 percent). With RNG technologies players now believe in an equal chance of winning and no manipulation of results.
• No patterns or cycles: Many players believe slots run in cycles, but that's a myth. Thanks to RNG, each spin is independent of the last.

How RNG randomises slots outcome

Since RNG generates numbers independently and unpredictably, each spin is completely random and unrelated to previous spins. This means no patterns, no cycles, and no way to predict the outcome of RNG-based slots UK. The entire process happens in a split second, making sure every spin is fair and random, which also gives all players a genuine chance to win. 

Here's a step-by-step process explaining how it works:

1. Continuous number generation: The RNG is always running, generating random numbers at a rapid pace, often thousands per second.
2. Number selection at spin: The moment you press "spin," the RNG selects the current random number it has generated. This number acts like a code that corresponds to the position of the slot reels.
3. Mapping numbers to symbols: Each random number is linked to specific reel positions and symbol combinations. The slot's software uses this number to set the reels where the symbols will stop.
4. Outcome displayed: The reels spin and then stop on the symbols determined by the RNG's chosen number, resulting in either a win or a loss.

The difference between true RNG and pseudo-RNG 

As mentioned earlier, the two major types of Random Number Generators are true RNG and pseudo-RNG. The table below shows the differences between both options.

Feature	True RNG (TRNG)	Pseudo-RNG (PRNG)
Source of randomness	Based on physical, natural phenomena (e.g., radioactive decay)	Based on mathematical algorithms and initial “seed” values
Randomness quality	Truly random and unpredictable	Deterministic but appears random
Speed	Generally slower due to reliance on physical processes	Very fast, suitable for real-time applications like slots
Use in slot machines	Rarely used due to complexity and speed limitations	Commonly used because of efficiency and ease of testing
Testing & certification	More difficult to test due to unpredictability	Easier to test and certify for fairness

Why casinos prefer pseudo-RNG system 

While true random number generators (TRNGs) produce genuine randomness, most online rely on pseudo-random number generators (PRNGs) for the following important reasons:

• Speed and efficiency: PRNGs can generate random numbers almost instantly, which is essential for slot machines where spins happen rapidly and continuously. TRNGs, relying on physical processes, tend to be slower and less practical for fast-paced gaming.
• Predictable testing and certification: PRNGs are based on algorithms that can be thoroughly tested, audited, and ensures compliance with gaming regulations.
• Consistency and reliability: PRNGs provide stable performance without relying on external physical factors that might fail or cause delays.

Fairness and Security: Ensuring Trust in Slot Games 

"…the most unregulated environment on the planet: The internet, a place where there are bound to be people who don't play fairly", said Anthony Cabot in an interview with Forbes. The interesting thing is that developers often implement every possible means to keep online slot games fair and transparent. 

Apart from the Random Number Generator, licensed UK casinos also follow strict safety protocols set by the UKGC regulatory body, which are further discussed in this article.

"Given the correct powers and resources, the Gambling Commission can continue to make gambling safer, fairer and crime free." - Chief Executive of the Gambling Commission, Andrew Rhodes. 

UKGC Regulatory Standards and Testing for RNG Compliance 

The UK Gambling Commission (UKGC) is one of the world's leading regulatory bodies overseeing online and land-based gambling. Ensuring that slot machines and other casino games use reliable and fair Random Number Generators (RNGs) is a critical part of the UKGC's mission to protect players.

Key UKGC requirements for RNG compliance:

• Certification by independent labs: All RNG software used in games must be tested and certified by accredited third-party testing labs, such as eCOGRA, GLI (Gaming Laboratories International), or iTech Labs. These labs conduct rigorous checks to verify the RNG's randomness and fairness.
• Statistical testing: The RNG undergoes extensive statistical analysis to confirm that its output is genuinely random and unbiased over millions of spins. This ensures no patterns or predictability in the results.
• Audit trails and logging: Casinos must maintain detailed records of RNG performance and game outcomes, enabling audits and investigations if needed.

Conclusion

Far from being just a game of luck, authentic online slots rely on complex algorithms that ensure every spin is truly random and unpredictable. Whether you're a casual player or a seasoned gambler, knowing about RNG helps put the odds into perspective. So always bear in mind that slots gaming is a carefully designed system that makes sure the game is fair and fun at the same time.

If you want to know more on how licensed operators present games and safety tools, you can review guides from Prime Casino.