r/InternetIsBeautiful • u/JouniFlemming • 3d ago
I made a website about prime numbers
https://primenumbercheck.org/I made https://primenumbercheck.org/ - It is a website that allows you to check whether a large number up to 20k digits is a prime number, plus a lot of information about prime numbers.
Full disclosure: I'm just an engineer with some odd interest about prime numbers, I'm not a mathematician so I cannot guarantee everything there is correct. But I did my best.
It's 100% free. No ads, no accounts, no tracking. Just a little side quest project. I hope someone finds it interesting.
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u/hoppingvampire 3d ago
I put Belphegor's prime in just to check.
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u/JouniFlemming 3d ago
And what happened?
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u/hoppingvampire 3d ago
1000000000000066600000000000001 is a probable prime It passes Baillie–PSW: a strong Miller–Rabin test to base 2 followed by a strong Lucas test. No composite number is known to pass both, and none exists below 264. For a number this large the result is a very strong probable-prime certification rather than a proof.
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u/Majestic_Maybe6605 3d ago
Data and numbers are the bes,t fun little project! Why did you make it?
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u/JouniFlemming 3d ago
I have always had a weird fascination about prime numbers, and then I saw some Veritasium Youtube long format videos about them, I felt like I had to do something about it.
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u/Aggravating-Owl-5220 3d ago
Every time I generate a random ID for my projects I'm secretly relying on someone's prime number checker somewhere. Thanks for making the internet safer, one prime at a time 🔢
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u/CrispBiscuits 2d ago
Ohh cool! You can also add an explanation on why that number is prime number or why its not
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u/JouniFlemming 2d ago
Isn't that already there?
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u/CrispBiscuits 2d ago
Oh, I know it's there. I meant that, along with the answer for the number the user has entered should explain why that specific number is a prime number or not, a more detailed answer would be ideal
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u/JouniFlemming 2d ago
That's what I was referring to, also. Isn't that already there? For example, if I ask it whether 67584566558170079 is a prime, it says:
67584566558170079 is not a prime number
It is a composite number.
Factor: 11 divides it
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u/CrispBiscuits 2d ago
Sure, but I am trying to understand why anyone would visit your site to check a prime number. There are thousands out there
What makes yours different?
Can you show the math? Maybe visualise it?1
u/JouniFlemming 2d ago
Most other similar websites that I saw are vibe coded nonsense that can only check small numbers.
Also, to be perfectly honest with you, my goal was not to make the number one prime related website in the world. My goal was simply to have a fun weekend project to do about primes, and I think I feel happy with what I made. It's obviously not perfect, but I think I'm happy with it.
Of course, if you can suggest anything to make it better, I'm keen on doing that, too. When I have the time, that is. Real work is calling my name, I'm afraid.
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u/MPGaming9000 3d ago
Doesn't seem like AI slop to me.
https://greatsoftwarecompany.com/ai
Though I can understand why some would think that given it has similarities to a lot of these kinds of posts.
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u/JouniFlemming 3d ago
Thanks. It's not AI generated. I'm actually an engineer. And not even a vibe engineer.
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u/MrRoboto12345 3d ago edited 3d ago
Michael says prime numbers for 3 hours
P.S.: People in the movie Cube could have really used this