/**
 * * Checks if a number is prime.
 *
 * @param number The number to check.
 * @returns Boolean: `true` if the number is prime, otherwise `false`.
 */
export declare const isPrime: (number: number) => boolean;
/**
 * * Find prime numbers in a given range.
 *
 * @param start The starting number of the range. Default is `1`.
 * @param end The ending number of the range. Default is `1000`.
 * @returns An array of prime numbers within the range (inclusive).
 */
export declare const findPrimeNumbers: (start?: number, end?: number) => number[];