Hans Riesel Swedish Mathematician
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Hans Riesel is a member of the following lists: 1929 births, People from Stockholm and Number theorists.
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Details
| First Name |
Hans
|
| Last Name |
Riesel
|
| Birthday |
30th November, 1928
|
| Died |
21st December, 2014
|
| Nationality |
Swedish
|
| Occupation |
Mathematician
|
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 2-1 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.
