The home for great developer writing.

We surface the best developer writing from thousands of independent blogs, updated daily.

Test whether a large integer is a square

· John Cook · June 27, 2025, 1:06 a.m.

Computing programming mathematics algorithms Performance Optimization

Summary

The blog post discusses a fast algorithm for determining if a large integer is a perfect square by utilizing hexadecimal digit properties and square root calculations.

Read full post on www.johndcook.com →

MORE POSTS LIKE THIS

◦୦◦◯◦୦◦⊚⚪⊚◦୦◦◯◦୦◦᪣🞊᪣𝆯᪣🞊᪣ ᪣🞊᪣𝆯᪣🞊᪣◦୦◦◯◦୦◦⊚⚪⊚◦୦◦◯◦୦◦

⠀ ᯽ ᯽ ⠀ · Jun 14, 2026

oo programming

synchronization of buckets filling and emptying

Graphthinking Blogspot · May 24, 2026

llm probability

Problem 14: Check if a Number is Prime

Vicente G. Reyes · Feb 16, 2026

Python beginners

Golden iteration

John Cook · Dec 12, 2025

Math programming

[Math] Logarithms for programmers

Dennis Yurichev · Apr 10, 2025

programming mathematics

Mono in the partial ordering of measures of disorder

The Sparkelling Bedangler · Nov 1, 2026

presortedness mathematics

Discover more posts →

AUTHOR