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_compl...
Re:I Got a Knuth Check for 0x$3.00
by HumanHater on Sunday May 19, 2019 @07:59AM
(#19952870)
> The Karatsuba algorithm is a fast multiplication algorithm. It was discovered by Anatoly Karatsuba in 1960 and published in 1962.
> Were Soviet universities at the time closed over Christmas
No, Christmas was not an official holiday. Also, it's on the 7th of January.
Based on the information given, the correct year _could_ be 1961, too. When, exactly, was that seminar? Were Soviet universities at the time closed over Christmas?