Math Constant Explorer.
Generate the digits of π, τ, or e live in your browser, up to 100,000 of them, then play with the data. Highlight any digit 0–9 across the whole expansion and watch a histogram reveal how evenly the digits are spread. Nothing is stored; every digit is computed on the spot.
Pi π
// how this works & what the histogram shows
Every digit you see is generated on the spot using JavaScript's
arbitrary-precision
BigInt
math, with no lookup tables and no downloads.
π and τ use the
Chudnovsky algorithm
(with binary splitting
so even 100,000 digits compute in about a second), and e uses its
Taylor series
(the sum of 1/n!). Heavy math runs in a
Web Worker
so the page never freezes.
The histogram counts how often each digit 0–9 appears. The dashed line marks the count you'd expect if every digit were equally likely (the total divided by ten). π, τ, and e are all believed to be normal, meaning every digit and digit-sequence should occur with equal long-run frequency, so the bars should sit close to that line, and the χ² figure stays small. Pick a larger digit count and watch the bars even out: that's the law of large numbers at work.
Privacy: everything runs locally in your browser. Nothing is uploaded or stored.
// a free, browser-only tool by Tiempo Software, built in Omaha, Nebraska. Runs entirely in your browser; nothing you enter is uploaded. see all tools.