import numpy as np
import time
import os

def clear_terminal():
    """Clear the terminal screen."""
    os.system('cls' if os.name == 'nt' else 'clear')

def sieve_of_eratosthenes(limit):
    """Sieve of Eratosthenes to find all primes up to 'limit'."""
    sieve = np.ones(limit // 3 + (limit % 6 == 2), dtype=bool)
    sieve[0] = sieve[1] = False  # 0 and 1 are not prime

    # Iterate only for numbers that are prime
    for i in range(1, int(limit**0.5) // 3 + 1):
        if sieve[i]:
            prime = 3 * i + 1
            sieve[3 * i + prime::prime * 3] = False

    primes = [2, 3]
    for i in range(1, len(sieve)):
        if sieve[i]:
            primes.append(3 * i + 1)
    return primes

def write_prime_to_file(prime, filename):
    """Write the hexadecimal and decimal representation of a prime number to the file."""
    hex_prime = f"{prime:08X}"  # Convert to hex with leading zeros (8 digits)
    with open(filename, 'a') as f:  # Open in append mode
        f.write(f"{hex_prime} {prime}\n")

def main():
    limit = 4294967295
    filename = 'primes.txt'

    # Start the sieve calculation and time it
    start_time = time.time()
    total_primes = 0

    for prime in sieve_of_eratosthenes(limit):
        total_primes += 1
        write_prime_to_file(prime, filename)

        # Clear the terminal and update information
        clear_terminal()

        elapsed_time = time.time() - start_time
        estimated_time_left = (elapsed_time / total_primes) * (len(primes) - total_primes) if total_primes > 0 else 0

        # Print the last prime, elapsed time, estimated time left, and total primes found
        print(f"Last Prime Found: {prime}")
        print(f"Total Primes Found: {total_primes}")
        print(f"Elapsed Time: {elapsed_time:.2f} seconds")
        print(f"Estimated Time Left: {estimated_time_left:.2f} seconds")

    # Print final completion message
    print(f"Finished calculating primes up to {limit}.")
    print(f"Total Primes Found: {total_primes}")
    print(f"Total Elapsed Time: {elapsed_time:.2f} seconds")

if __name__ == "__main__":
    main()