What is a Casino Random Number Generator? RNG Explained

When you visit land-based casinos and play table games in person, you can see the fair play unfold in real time through physical processes.

But how do you get assurance of random and transparent play with online gambling?

The answer, my friend, lies within random number generators. But what exactly is a casino random number generator?

In this piece, our iGaming experts go beneath the reels and delve into the science of how virtual and traditional gambling parlors incorporate random number generators (RNG) to maintain player confidence.

More on Casino Random Number Generators

How Do Random Number Generators Work?

RNG algorithms from a casino’s server generate numbers through precise and advanced mathematical equations for on-the-spot and true randomness. All RNGs begin the random sequence with a seed number. Depending on the particular casino software, that seed number can incorporate the precise moment in time and other elements in its algorithm to produce a truly random outcome.

To keep their casino game licenses in good standing, licensed online casinos like Golden Nugget and Betway must ensure randomness for their virtual casino games via RNGs. Live dealer casinos use RNG software in certain instances even though players are playing against a human via a live stream and can see the physical process of numbers generated. Retail casinos also use a hardware random number generator algorithm to adhere to license requirements.

Additionally, reputable casino game developers incorporate RNG software for standalone casino games to satisfy the state commissions.

Types of Random Number Generators

Casino apps use different methods for randomly generated numbers depending on their operations and the type of RNG games they offer. Below, we list the most common methods and describe the tremendous lengths retail casinos and premier online gambling sites go to perfect their RNG algorithms.

True Random Number Generator (TRNG)

A TRNG tackles the RNG process through physical means. The art of TRNG expertly uses thermal noise to properly check electronic components, unstable atmospheric phenomena like distortions in the air, and even cosmic rays from space. Yes, it’s that precise to bring the player random results.

TRNG also incorporates Mother Nature for testing. It can be as simple as reading the natural pulses and energy from thunderstorms and lightning to determine how they affect random gameplay.

Pseudo Random Number Generator (PRNG)

A pseudo-random number generator relies solely on a finite number of algorithms to determine fair and transparent game results. As a result, PRNGs don’t rely on external numbers or outside influences. The pseudo RNG considers essential elements like the player’s length of gameplay and game strategies to determine transparency and true randomness.

Because the pseudo-random number generator sticks to the same formula, it will usually have a consistent sequence of numbers. The longer a player plays a game, the less likely that the same number will be repeated using pseudo-random number generators. No matter how sophisticated the formula, all PRNGs will eventually repeat results once they’ve gone through all the random seed numbers.

Another aspect of the pseudo-transparency process is the Mersenne Twister. The Mersenne Twister is used when more extensive or longer periods for seed numbers are necessary, such as determining slot game jackpots. Due to Mersenne Twister’s widely extensive number generators, casino operations and companies that use in-depth computing heavily rely on this process.

How Do RNGs Work in Online Casinos?

Real money online casinos often use the seed number method and RNG software, such as a pseudorandom number generator, to apply total randomness to their virtual casino games. For standalone card games, to uphold the highest statistical randomness, it’s common for the cards to be shuffled frequently and multiple times to ensure fair dealing.

To make outcomes even more airtight, reputable online gambling apps involve an independent third party to review the numbers generated and overall algorithms to verify that the casino produces random outcomes. These third-party testing companies perform statistical tests on virtual games. For instance, Gaming Labs International is a master in this domain and has been operational since 1989. Thanks to leaps in technology, it continues helping casinos keep their games and video poker machines up-to-date with the latest randomized mechanics.

Best RNG Online Casino Games

Take a moment to discover how RNGs work for the most common and fan-favorite casino games.

Live Dealer Games

Game developers like Evolution spearhead the modern-day live dealer experience, where players compete against a professional dealer or croupier via a live stream. They can see the game unfold and win or lose in real time.

Note that live dealer games use RNG on a limited basis. Even though the live dealer physically shuffles the cards and deals them, the RNG process is still involved to determine the dealing order of players.

Beyond the deal, live games like live roulette, craps, and Sic Bo incorporate RNG to verify transparency and confirm adherence to the rules. RNG is also used for placing dice and spinning game wheels.

Slots

For virtual and physical slot machines, pseudo RNGs help properly align the reels. If the online slot game has many paying symbols, the pseudo algorithm uses a longer seed number process to ensure true randomness.

However, the variance rate is the biggest factor in fair results with slots. Variance, or the variability rate, influences the frequency with which symbols appear to form winning combinations. Games like Gonzo’s Quest use a tumble feature where new icons tumble onto the reels, which lengthens the pseudo variance to accommodate for the additional icons.

Roulette

For retail gambling parlors, the croupier straightens out the reels and counts the chips before each spinning. But for the online version of the little wheel, the RNG process begins before the player spins the roulette wheel, with the seed number already going through the process to determine the winning number. Each pocket number, including American Roulette’s double zero, is incorporated into the RNG process and algorithms. Because the winning number is determined pre-spin, it tamps down on repeating numbers.

Blackjack

Before the cards are dealt, the RNG process determines which cards will be dealt and in what order for the dealer and the player. Each card in the online blackjack deck is assigned a symbol or a numeric value. In between playing hands, the RNG shuffles the deck as part of its algorithm.

RNG Certification

Land-based casinos and online gambling sites earn RNG certificates through independent third parties like Gaming Labs International, BMM Testlabs, and eCOGRA. Online casinos reach out to these organizations and have them review their RNG algorithm as the first step toward certification. These companies go through the random number generation algorithm with a fine-tooth comb to ensure natural randomness.

In addition to applying statistical tests for satisfactory random numbers, these companies also finely examine the casino’s server, the source code, game software, and other hardware components to see if they pass diehard tests. These RNG tests ensure that they hold up against hackers or, in the case of online gambling, devastating cyber hacks and data breaches.

Assuming the casino passes all the tests, they are given a random number generator RNG certification. Online gambling sites share the RNG certification with their state’s gaming commission and proudly display it on their websites to assure their commitment to randomness.

Random Number Generator FAQs

Hopefully, you now feel more confident about the RNG process and can play your games with responsible gaming measures. Rest assured, credible gambling parlors, including virtual ones, take gaming transparency as seriously as data security to maintain their sterling brand reputations. To help you recap the RNG essentials, please consider the FAQs below.

Is an online casino random number generator legit?

RNGs are tested exhaustively by reputable third-party companies for consistent, fair, and random outcomes for each spin, dice roll, or playing hand. The entire point of RNG is to prevent hacking and cheating. The software uses complex methods in real time so that no player or the live dealer can gain an unfair advantage.

Does the random number generator (RNG) in slot machines increase my chances of winning?

No. With any slot game, it’s the luck of the draw that determines the outcome. A wise gambler makes small bets so that they can stick around and play the game longer. because all it takes is one spin to change your fortunes and your life. Using free spins and other casino bonuses can help add to your budget so you can play longer. Always choose a slot with an RTP of 95% or higher to better position yourself for a return.

Are RNGs fair when using an online casino?

iGaming parlors use a random pseudo generator to ensure fairness. iGaming sites apply for RNG certification to comply with state gaming commissions and assure online gamblers that they are legit.