Mysteries of Math: Unsolved Problems & Unexplained Patterns

7 Math problems that haven't been solved yet — part 1

wtc on Instagram: "This footage captures the last sunset of an entire millennium, taken on December 31, 2000. The 20th century (1901-2000) was the last century of the 2nd millennium (1001-2000). While some people celebrated the new millennium in 1999, the official end of the 2nd millennium and the 20th century was December 31, 2000, with the 3rd millennium and 21st century beginning on January 1, 2001. #neverforget"