MinPowerOfTwo

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MinPowerOfTwo
{
    class Program
    {
        static void Main(string[] args)
        {
            int number;
            int minNumber = 1;
            int maxNumber = 400;
            int exponentiatingNumber = 2;
            int currentPowerNumber;
            int countPower;

            Random random = new Random();

            number = random.Next(minNumber, maxNumber + 1);
            Console.WriteLine($"Получено число: {number}\n");

            currentPowerNumber = exponentiatingNumber;
            countPower = 1;
            while (currentPowerNumber < number)
            {
                countPower++;
                currentPowerNumber *= exponentiatingNumber;
            }

            Console.WriteLine($"2 в степени {countPower} = {currentPowerNumber}");
            Console.ReadKey();
        }
    }
}