Bryant Tuckerman
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Bryant Tuckerman (November 28, 1915 - May 19, 2002) was an American mathematician, born in Lincoln, Nebraska. He was a member of the team that developed the Data Encryption Standard (DES).
He studied topology at Princeton, where he invented the Tuckerman traverse method for revealing all the faces of a flexagon.
He was also the discoverer, on March 4, 1971, of the 24th Mersenne prime, a titanic prime, with a value of
- 219937 − 1.