Finally figured it out! It is 840242( 1). Obviously, the100000 digit of the password is 8. According to the following information, it can be preliminarily concluded that this number is 8? 0? 4(2) The unit of the first three digits is 0. Since 1 00000 bits, 10000 bits and 1000 bits are multiples of 35, and1000 bits are 0, so 5 is only 0 if multiplied by an even number, so it can be inferred that this number is also a multiple of 70. The multiple of 70 is easy to calculate, and you can get the answer right away. Only 840 meets the requirements. Because "hundred digits are the same as single digits", the password is 840242. In fact, mathematics is the most troublesome, humiliating and interesting.