The logo for Millennium Science School in [[Blue Archive]]. 

Often appearing on the "clothing":[/posts/6507372] of students, on their "equipment":[/posts/7108071], and "lanyards":[/posts/6594194]. Its design incorporates the number "7" into the letter "M", referencing "The seven Millennium Prize Problems":[https://en.wikipedia.org/wiki/Millennium_Prize_Problems] the school is named for.