# -*- coding: UTF-8 -*-
 
# Filename : test.py
# author by : www.
 
# Python 程序用于检测用户输入的数字是否为质数
 
# 用户输入数字
num = int(input("请输入一个数字: "))
 
# 质数大于 1
if num > 1:
   # 查看因子
   for i in range(2,num):
       if (num % i) == 0:
           print(num,"不是质数")
           print(i,"乘于",num//i,"是",num)
           break
   else:
       print(num,"是质数")
      
# 如果输入的数字小于或等于 1，不是质数
else:
   print(num,"不是质数")

def is_prime(n):
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

# 测试函数
number = 29
if is_prime(number):
    print(f"{number} 是质数")
else:
    print(f"{number} 不是质数")

def is_prime(n):
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

# 测试函数
number = 142857
if is_prime(number):
    print(f"{number} 是质数")
else:
    print(f"{number} 不是质数")

# RSA加密算法中使用素数
import random

def generate_large_prime():
    while True:
        num = random.randint(100, 1000)
        if is_prime_optimized(num):
            return num

p = generate_large_prime()
q = generate_large_prime()

print("生成的大素数 p:", p)
print("生成的大素数 q:", q)

# 在哈希算法中选择散列函数长度
def select_hash_length(data_size):
    possible_lengths = [16, 32, 64, 128]  # 可选的散列长度
    for length in possible_lengths:
        if is_prime_optimized(length) and length > data_size:
            return length

data_size = 100
hash_length = select_hash_length(data_size)

print("选择的散列函数长度:", hash_length)

不知道咋运行的，提示选择的散列函数长度: None