John D. Cook

A mental random number generator

New symbols in Unicode 17

Mandelbrot and Fat Tails

Bech32 encoding

Inferring sample size from confidence interval

Mandelbrot area and escape times

Mandelbrot points of every period

Minimalist Mandelbrot set

Measuring cryptographic strength in liters of boiling water

Impossible rational triangles

Trigamma

Vanity addresses

An integral theorem of Gauss

El Salvador’s Bitcoin and Quantum Computing

How quantum computing would effect Bitcoin

Storing data in images

An uncrossed knight’s tour

Dithered QR codes

Probability of typing a wrong Bitcoin address

Why are CUDA kernels hard to optimize?

The biggest math symbol

You can’t have everything you want: beta edition

More on seed phrase words

Variations on Knuth’s Twindragon

Intuition for Pick’s Theorem

Knuth’s Twindragon

What’s hierarchical about a hierarchical wallet?

Punch Cards and Dollar Bills

A recipe for creating random fractals

When log(x) has the same digits as x

Connecting partial sums

A lot of seed phrase words are similar

Factoring Stencils

Recovering a permuted seed phrase

What’s in your wallet?

Randomly generated dragon

Converting very long strings to integers in Python

American Flag Prime

Uppercase Eszett

Weierstrass, Montgomery, and Edwards elliptic curve forms

Tiny Jubjub

Two ways of generalizing π