Ever wondered how the ^.?$|^(..+?)\1+$ regular expression can tell you if a number is not prime? In this blog post you'll learn how and why it works. Code examples in Java, JavaScript, Python and Perl are provided.

Found 99 vulnerabilities (84 moderately irrelevant, 15 highly irrelevant)

Find out the technology stack of any website. Create lists of websites and contacts by the technologies they use.

'Anom’ phones used in an FBI honeypot are mysteriously showing up on the secondary market. We bought one.

Penpot is the open-source free design software that connects designers and developers with no handoff drama. Prototyping, UI design and code - all in one app.

A one-stop-shop for explanation about Right to Left languages online.