Much more there if you can bother to look through it all. My point being that Alberio's 1001 is carefully chosen as oppose to the numbers on the Class 3-A girls' cards. It is also unlikely that Alberio is Nagi's 1001st partner and thus serving a register function, being already mentioned in volume 7's remarks that the numbers on the cards have meaning to them.
Humans' superstition considers the numbers 7, 11, and 13 to be bad luck. In playing dice, 7 and 11 are "crapping" or drop-out numbers. And 13 is awful. But so long as the comprehensive cyclic dividend fails to contain prime numbers which may occur in the data to be coped with, irrational numbers will build up or erode the processing numbers to produce irrational, ergo unnatural, results. We must therefore realize that the tables of the trigonometric functions include the first 15 primes 1, 2, 3, 5, 7, 11, 13, 17, 19, 23,29,31,41,43.
We know 7 × 11 is 77. If we multiply 77 by 13, we get 1,001. Were there not 1,001 Tales of the Arabian Nights? We find these numbers always involved with the mystical. The number 1,001 majors in the name of the storytelling done by Scheherazade to postpone her death in the Thousand and One Nights. The number 1,001 is a binomial reflection pattern: one, zero, zero, one.