How to Pronounce Hans Riesel
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May 28, 1929 Stockholm, Sweden Died on 21 Dec 2014 (aged 85)
Swedish mathematician
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Hans Riesel, Date of Birth, Place of Birth, Family, Facts, Age, Net Worth, Biography and More in FamedBorn.com
About Hans Riesel
- Hans Ivar Riesel (May 28, 1929 in Stockholm – December 21, 2014) was a Swedish mathematician who discovered the 18th known Mersenne prime in 1957, using the computer BESK: this prime is 23217-1 and consists of 969 digits.
- He held the record for the largest known prime from 1957 to 1961, when Alexander Hurwitz discovered a larger one.
- Riesel also discovered the Riesel numbers as well as developing the Lucas–Lehmer–Riesel test.
- After having worked at the Swedish Board for Computing Machinery, he was awarded his Ph.D.
- from Stockholm University in 1969 for his thesis Contributions to numerical number theory, and in the same year joined the Royal Institute of Technology as a senior lecturer and associate professor.
