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True Random Number Service

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What’s this fuss about true randomness?

Perhaps you have wondered how predictable machines like computers can generate randomness. In reality, most random numbers used in computer programs are pseudo-random, which means they are generated in a predictable fashion using a mathematical formula. This is fine for many purposes, but it may not be random in the way you expect if you’re used to dice rolls and lottery drawings.

RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs. People use RANDOM.ORG for holding drawings, lotteries and sweepstakes, to drive online games, for scientific applications and for art and music. The service has existed since 1998 and was built by Dr Mads Haahr of the School of Computer Science and Statistics at Trinity College, Dublin in Ireland. Today, RANDOM.ORG is operated by Randomness and Integrity Services Ltd.

Games and Lotteries

Lottery Quick Pick is perhaps the Internet’s most popular with over 280 lotteries
Keno Quick Pick for the popular game played in many countries
Coin Flipper will give you heads or tails in many currencies
Dice Roller does exactly what it says on the tin
Playing Card Shuffler will draw cards from multiple shuffled decks
Birdie Fund Generator will create birdie holes for golf courses

Random Drawings

Q3.1 in the FAQ explains how to pick a winner for your giveaway for FREE
Third-Party Draw Service is the premier solution to holding random drawings online
Step by Step Guide explains how to hold a drawing with the Third-Party Draw Service
Step by Step Video shows how to hold a drawing with the Third-Party Draw Service
Price Calculator tells exactly how much your drawing will cost
Drawing FAQ answers common questions about holding drawings
Public Records shows all completed drawings going back five years
Drawing Result Widget can be used to publish your winners on your web page
Multi-Round Giveaway Service for verified video giveaways


Integer Generator makes random numbers in configurable intervals
Sequence Generator will randomize an integer sequence of your choice
Integer Set Generator makes sets of non-repeating integers
Gaussian Generator makes random numbers to fit a normal distribution
Decimal Fraction Generator makes numbers in the [0,1] range with configurable decimal places
Raw Random Bytes are useful for many cryptographic purposes

Lists and Strings and Maps, Oh My!

List Randomizer will randomize a list of anything you have (names, phone numbers, etc.)
String Generator makes random alphanumeric strings
Password Generator makes secure passwords for your Wi-Fi or that extra Gmail account
Clock Time Generator will pick random times of the day
Calendar Date Generator will pick random days across nearly three and a half millennia
Geographic Coordinate Generator will pick a random spot on our planet’s surface
Bitmaps in black and white
Hexadecimal Color Code Generator will pick color codes, for example for use as web colors
Pregenerated Files contain large amounts of downloadable random bits
Pure White Audio Noise for composition or just to test your audio equipment
Jazz Scales to practice improvisation for students of jazz guitar
Samuel Beckett’s randomly generated short prose
DNA Protein Sequence Randomizer (at Bio-Web)

Web Tools and Widgets for Your Pages

Integer Widget Wizard will put a mini-RANDOM.ORG on your web page or blog
Draw Widget Wizard will put the result of a paid drawing on your web page or blog
HTTP API to get true random numbers into your own code
Guidelines describe how to avoid getting in trouble
Banned Hosts lists who didn’t behave and have been blocked

Learn about Randomness

Introduction to Randomness explains what true random numbers are and why they’re interesting
History explains how RANDOM.ORG started and where it is today
Many Testimonials from folks who have found very creative uses for random numbers
Acknowledgements to all the generous folks who have helped out
Quotations about randomness in science, the arts and in life generally
Media Coverage and Scientific Citations lists popular print and scientific mention of the service
News about the latest additions to the site


Real-Time Statistics show how the generator is performing right now
Statistical Analysis explains how you test random numbers for randomness
Bit Tally shows how much randomness has been generated since 1998 (hint: lots!)
Your Quota tells how many random bits you have left for today

Contact and Help

FAQ contains answers to frequently asked questions
Newsletter appears at random intervals, but do sign up
Contact Details in case you want to get in touch

RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.

Screenshot Game: A New Way to Boost Engagement on Instagram

We reached 26,198 people in two days

In the past two days, my team and I created a promotional campaign using a screenshot game. The result is a miracle.

I don’t know when this trend started, but there is a trend in the Indonesian Instagram community called the screenshot game. If you aren’t aware yet of the screenshot game, let me give you an example of a screenshot game created by Jägermeister, promoted by a local rock band vocalist here.

The idea is to screenshot the object into the frame, and the game is designed to be so frustratingly hard that people start to talk about it, share with their peers, and ask their peers to try it. So this game has a viral element in it, and brands can start to create and integrate it for promotional campaigns. Like “if you succeed to screenshot the object in the frame, you will discounts or coupons.”

My team and I started my local apparel business in August 2019 and choose Instagram as our main channel to promote our products. Content by content, whether it was organic or paid, we weren’t get anything impactful. So when we saw this screenshot idea, we thought “Hey, let’s try this thing. And if someone succeeds, they’ll get a 20% discount”.

The result was a miracle. We stuck with around 380 followers for months before. And after we did this campaign, only in two days, we managed to get 26,198 reaches, 1,948 profile visits, 116 website clicks, 108 follows, and — wait for it — 317 direct messages. We only spent $2.40.

So how did we manage this? This are how it is done.

P.S. Our performance is arguably good or bad for some businesses since every business has their own KPIs, but we made a huge leap for sure. Which is a good start 😊

Create a Campaign Goal and Flow

Every campaign needs to have a goal, right? You can pick the goal that’s essential for your business, maybe sales or sign-ups. For now, we choose to increase our number of Instagram followers, and if we were lucky enough, our sales numbers.

To make sure we achieved this goal, we needed a clear flow to drive the audience. You can see our campaign flow in the flowchart below.

Create the Screenshot Game

The screenshot game needs to be relevant to your business. Since our products are t-shirts, we will use our t-shirts as the object. We also set how frequent certain products will appear, so we made our best-selling product appear only once, etc. You can see our screenshot game here.

You need to also clearly mention what the reward is, and what to do next if they succeed. Like the one that we did, we put “Get a 20% discount” and “DM us your screenshot to redeem the coupon”.

Execute the Plan

At first, we shared the screenshot game to our friends from each team member’s personal Instagram profile. We only wanted to see how they would respond to our screenshot game. Our friend’s responses were good, which gave us confidence about our screenshot game.

So we decided to promote the screenshot game from the Instagram story ad, which only costs us $2.40. The result was like what I mentioned at the beginning of this article.

We faced several problems in this campaign: 1. The audience who DMed us weren’t reading about the stated reward (they expected freebies), and 2. The audience who DMed us weren’t converted into sales nor followers.

That’s why — if you see my flowchart — whatever the audience does, the end goal is to follow or to visit our website. So if they expected freebies they can follow or subscribe to our mailing list, so they can be notified if we do giveaways. If they were not converted to sales or followers, we just needed to remind and persuade them.

The key point after all of these campaign processes is to nurture our existing prospective audience, at the same time trying to acquire more new prospective audiences to our Instagram page. Remember that this is only one of many ways that you can try.

That’s all I can share — I hope this screenshot game can be impactful to your business, just like ours. Or even more!

In the past two days, my team and I created a promotional campaign using a screenshot game. The result is a miracle. I don’t know when this trend started, but there is a trend in the Indonesian… ]]>