Pi
Search and inspect digits of pi.
Pi (π) is the ratio of the circumference of a circle to its diameter. Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction. That's because pi is what mathematicians call an infinite decimal: after the decimal point, the digits go on forever and ever.
Digits come from a 1 billion digit index [Source: Princeton]. Pick whichever tool below matches what you are looking for.
Show the first digits
Displays up to 10 million digits from the start.
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Digit at a position
Any position in the 1 billion digit index.
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Search for a run of digits
Searches all 1 billion digits and lists every position where they appear. Enter at least 3 digits.
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Digits in a range
Any range in the 1 billion digit index, up to 1,000,000 digits at a time.
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