Twin primes are prime numbers that are separated by just one number, like 11 and 13, or 17 and 19. And as you go up the number line, primes occur less frequently, and twin primes are rarer still.
孪生素数
仅由一个数字分隔的质数,例如 11 和 13, 或 17 和 19。 随着数字线的上升,素数出现的频率越来越低, 而孪生素数则更加罕见。