Prime numbers Articles

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2/14/2026 • EN

Finding a square root of -1 mod p

Explains how to compute a square root of -1 modulo a prime p, using number theory and Python code examples.

algorithm mathematics modular arithmetic number theory prime numbers

John D. Cook

1/10/2026 • EN

Bi-twin prime chains

Explores bi-twin prime chains, a mathematical pattern where sequences of twin primes follow a doubling rule, with examples and Python verification code.

algorithm mathematics number theory prime numbers Python

John D. Cook

1/6/2026 • EN

Largest known compositorial prime

A new record for the largest known 'compositorial prime' has been set, a prime number with over 3.7 million digits.

Computational Mathematics mathematics number theory prime numbers Scipy

John D. Cook

4/9/2020 • EN

A Little More Clojure

A tutorial on Clojure programming, covering basic functions and implementing a prime number sieve as a learning exercise.

Clojure functional programming lisp prime numbers tdd

Robert C. Martin

9/6/2016 • EN

On permuting all the things

Using R code to generate permutations of digits (2,2,5,5,9,9), analyzing divisibility by 11 and primality.

combinatorics prime numbers Probability R statistics

Thomas Lumley

Prime numbers Articles

Finding a square root of -1 mod p

Bi-twin prime chains

Largest known compositorial prime

A Little More Clojure

On permuting all the things

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