numbertoolkit¶

Fast number theory utilities for Python, backed by Rust.

import numbertoolkit

numbertoolkit.pi_digits(10)
# '3141592653'

The heavy lifting happens in a compiled Rust extension using exact integer arithmetic, so results are correct to the last digit and stay fast well into the millions of digits.

Installation¶

pip install numbertoolkit

Wheels are published for Python 3.10+ on macOS and Linux. On platforms without a wheel, pip falls back to the source distribution, which requires a Rust toolchain to build.

Quickstart¶

from numbertoolkit import (
    e_digits, first_n_primes, is_prime, phi_digits, pi_digits, sqrt_digits,
)

pi_digits(5)
# '31415'

pi_digits(5, decimal_point=True)
# '3.1415'

e_digits(5)
# '27182'

phi_digits(5)  # the golden ratio
# '16180'

sqrt_digits(2, 5)
# '1.4142'

is_prime(17)
# True

first_n_primes(5)
# [2, 3, 5, 7, 11]

len(pi_digits(1_000_000))  # a million digits in a fraction of a second
# 1000000

Digits are truncated, not rounded — see the API reference for details.

Learn more¶

• API reference — full documentation of every function
• Benchmarks — how it compares to mpmath
• Development — building, testing, and releasing