Apparently the seminar was held "in the autumn of 1960" [1], so "within a week" seems safely within 1960. That said, I will happily award 0x$0.50 to anyone who

Apparently the seminar was held "in the autumn of 1960" [1], so "within a week" seems safely within 1960. That said, I will happily award 0x$0.50 to anyone who can come up with conclusive proof that the algorithm was discovered in 1961. Karatsuba himself is dead though, so such evidence will not be easy to find. [1] https://www.researchgate.net/publication/258001835_The_complexity_of_computations https://www.researchgate.net/publication/258001835_The_compl...