import { NumberRuleChecker } from './number-rule-checker';
import { GuardResult } from '../../core/guard-result';
export declare class NumberIsPrime extends NumberRuleChecker<{
    type: 'isPrime';
}> {
    constructor(rule: {
        type: 'isPrime';
    }, value: number);
    /**
     * @override
     */
    exec(): GuardResult;
    /**
     * Checks if number is a prime number.
     * @remarks A prime number is a positive integer that is not a product of two smaller natural numbers.
     */
    private isPrime;
}