{"id":2667,"library":"primepy","title":"PrimePy","description":"PrimePy is a Python library designed to simplify operations related to prime numbers, offering functions for checking primality, generating primes within a range, and finding prime factors. The library's last update was in May 2018, and it is currently unmaintained, making it potentially unsuitable for new projects or critical applications.","status":"abandoned","version":"1.3","language":"en","source_language":"en","source_url":"https://github.com/janaindrajit/primePy","tags":["prime","factorization","math","numbers","mathematics"],"install":[{"cmd":"pip install primePy","lang":"bash","label":"Install with pip"}],"dependencies":[],"imports":[{"symbol":"primes","correct":"from primePy import primes"}],"quickstart":{"code":"from primePy import primes\n\n# Check if a number is prime\nprint(f\"Is 17 prime? {primes.check(17)}\")\nprint(f\"Is 10 prime? {primes.check(10)}\")\n\n# Get prime factors of a number\nprint(f\"Prime factors of 252: {primes.factors(252)}\")\n\n# Get the first 'n' prime numbers\nprint(f\"First 5 primes: {primes.first(5)}\")","lang":"python","description":"Demonstrates basic usage of `primePy` to check if a number is prime, find its prime factors, and get a list of the first 'n' prime numbers."},"warnings":[{"fix":"Consider using actively maintained alternatives like `sympy`, `primefac`, or implementing prime number logic manually for critical applications. Evaluate thoroughly before using in production environments.","message":"The library is unmaintained since its last release in May 2018. This means there are no ongoing bug fixes, security updates, or compatibility assurances with newer Python versions or dependencies.","severity":"breaking","affected_versions":"1.3 and earlier"},{"fix":"Always add an explicit check for `n > 1` when using `primes.check(n)` if adherence to the strict definition of prime numbers (greater than 1) is required.","message":"The `primes.check(1)` function incorrectly returns `True`, despite 1 not being considered a prime number by mathematical definition.","severity":"gotcha","affected_versions":"1.3 and earlier"}],"env_vars":null,"last_verified":"2026-04-10T00:00:00.000Z","next_check":"2026-07-09T00:00:00.000Z"}