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Efficient native Python implementation of the integer square root function.

Project description

Efficient Python implementation of the integer square root function.

PyPI version and link.

Purpose

Given an arbitrarily large non-negative integer n, finds the largest integer r such that r**2 <= n and (r+1)**2 > n. The running time is linear time in the bit length of the integer.

Package Installation and Usage

The package is available on PyPI:

python -m pip install isqrt

The library can be imported in the usual way:

from isqrt import isqrt

Acknowledgments

The initial version of this function was posted on Stack Overflow. A more efficient version was implemented by Alexander Gosselin here. The implementation in this package is adapted almost directly from these previous implementations.

Project details


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