--- title: "#prime articles | Hashnode" description: "Explore 7 articles tagged #prime on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/prime" --- Tag # #prime 7 posts · 0 followers [Harrison Eze](https://hashnode.com/@dharystyles) · [Feb 10](https://hashnode.com/posts/comprehensive-cryptography-notes-for-beginners/698af4d82470360999ac13cd) ### [Comprehensive Cryptography Notes for Beginners](https://harystyles.hashnode.dev/comprehensive-cryptography-notes-for-beginners?utm_source=hashnode&utm_medium=feed) Part 1: Encoding and Decoding What is Encoding? Encoding is the process of converting data from one format to another. It's about representation, not security. Think of it like translation: you're changing the language, but the message is still reada... 29 min read · [harystyles.hashnode.dev](https://harystyles.hashnode.dev/comprehensive-cryptography-notes-for-beginners?utm_source=hashnode&utm_medium=feed) [Anni Huang](https://hashnode.com/@HuangAnni) · [Jul 13, 2025](https://hashnode.com/posts/leetcode-204-count-primes-sieve-of-eratosthenes-solution-med-java-onn/6873376137ec115b36ed53d4) ### [LeetCode 204 Count Primes - Sieve of Eratosthenes Solution (Med, Java, O(n√n))](https://huanganni.hashnode.dev/leetcode-204-count-primes-sieve-of-eratosthenes-solution-med-java-onn?utm_source=hashnode&utm_medium=feed) From Ancient Mathematics to Modern Algorithms: Efficiently Finding All Primes Below n 5 min read · [huanganni.hashnode.dev](https://huanganni.hashnode.dev/leetcode-204-count-primes-sieve-of-eratosthenes-solution-med-java-onn?utm_source=hashnode&utm_medium=feed) [Anni Huang](https://hashnode.com/@HuangAnni) · [Jul 13, 2025](https://hashnode.com/posts/leetcode-264-ugly-number-ii-two-approachesmed-java-on/687350d8c072bf613a12f9a7) ### [LeetCode 264 Ugly Number II - Two approaches(Med, Java, O(n))](https://huanganni.hashnode.dev/leetcode-264-ugly-number-ii-two-approachesmed-java-on?utm_source=hashnode&utm_medium=feed) Three pointers to keep track of the primes 2 min read · [huanganni.hashnode.dev](https://huanganni.hashnode.dev/leetcode-264-ugly-number-ii-two-approachesmed-java-on?utm_source=hashnode&utm_medium=feed) [Tech Beastz](https://hashnode.com/@techbeastz) · [Apr 11, 2025](https://hashnode.com/posts/the-smart-home-ready-for-prime-time/67f8973d72627f20735065a5) ### [The Smart Home: Ready for prime time?](https://techbeast.hashnode.dev/the-smart-home-ready-for-prime-time?utm_source=hashnode&utm_medium=feed) Remember when home automation felt like something straight out of a sci-fi movie? Well, those days are long gone! Smart devices have gone mainstream, and they're changing the way we live, sometimes in ways we might not even realize. Here's a peek ... 2 min read · [techbeast.hashnode.dev](https://techbeast.hashnode.dev/the-smart-home-ready-for-prime-time?utm_source=hashnode&utm_medium=feed) [Priya Chakraborty](https://hashnode.com/@PriyaChakraborty) · [Jun 17, 2023](https://hashnode.com/posts/day-11-of-python-top-100-questions-from-basic-to-advanced/648dfbe52ec71b87f518b4a6) ### [DAY 11 of PYTHON top 100 questions : from Basic to Advanced !!](https://priyachakraborty.hashnode.dev/day-11-of-python-top-100-questions-from-basic-to-advanced?utm_source=hashnode&utm_medium=feed) Write a Python program to check whether a given number is a prime number or not:- num = int(input("Enter a number: ")) result = "" i = 2 while i \* i <= num: if num % i == 0: result = "not " break i += 1 if num < 2 or result... 1 min read · [priyachakraborty.hashnode.dev](https://priyachakraborty.hashnode.dev/day-11-of-python-top-100-questions-from-basic-to-advanced?utm_source=hashnode&utm_medium=feed) [Rajganesh Pandurangan](https://hashnode.com/@rajp) · [Jan 16, 2023](https://hashnode.com/posts/prime-numbers-what-they-are-and-why-they-matter/63c56fb0412b34bdfae33cd9) ### [Prime Numbers: What They Are and Why They Matter](https://blog.bhuvanpati.com/prime-numbers-what-they-are-and-why-they-matter?utm_source=hashnode&utm_medium=feed) Prime numbers have captivated mathematicians for centuries. They’re so simple yet so important—they’re used in cryptography, coding, computer science, and much more. In this blog post, we’ll explore what prime numbers are, why they’re important, and ... 2 min read · [blog.bhuvanpati.com](https://blog.bhuvanpati.com/prime-numbers-what-they-are-and-why-they-matter?utm_source=hashnode&utm_medium=feed)