Disclaimer: I really thought long about this, and I haven't slept in two days due to ongoing harassments of 4chan. As the first people were literally arriving at my place of living, where t...

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)

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