Recently, American mathematicians checked all the numbers below 1 million one by one on the computer of Yale University and found 42 pairs of "blind date numbers".
Relative number: At present, more than 1 0,000 pairs of blind date objects have been found.
However, how many pairs of "blind dates" are there? Are there unlimited rights? What is their distribution law? Until today, mathematicians have not come to a clear answer.