Landon Curt Noll (born October 28, 1960)[1][2] is an American computer scientist, co-discoverer of the 25th Mersenne prime and discoverer of the 26th,[3] which he found while still enrolled at Hayward High School and concurrently at California State University, Hayward.

[5] He is also the co-inventor (with John Horton Conway) of a system for naming arbitrarily large powers of 10.

[6][7] He also helped start the International Obfuscated C Code Contest,[8] and is a co-inventor of the Fowler Noll Vo hash function.

[13][14] His work includes measuring the Solar parallax during the 2004 Transit of Venus[15] as well as the search for Vulcanoid asteroids.

[16] He was also involved in politics as a Sunnyvale, California city council member and vice-mayor.