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Returns the inverse of a modulo n, or None if a is not invertible modulo n. All as will be considered not invertible for n == 1.

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Signature

pub fn u256_inv_mod(a: u256, n: NonZero) -> Option>

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Examples

use core::math::u256_inv_mod;

let inv = u256_inv_mod(3, 17);
assert!(inv == Some(6));