# Mathematician:Hans Ivar Riesel

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## Mathematician

Swedish mathematician who found the $18$th Mersenne prime $2^{3217} - 1$ in $1957$.

He held the record for the highest known prime from $1957$ to $1961$, when Alexander Hurwitz found the next two.

## Nationality

Swedish

## History

- Born: May 28, 1929, Stockholm, Sweden
- Died: December 21, 2014

## Theorems and Definitions

Results named for **Hans Ivar Riesel** can be found here.

Definitions of concepts named for **Hans Ivar Riesel** can be found here.

## Publications

- 1979:
*Partitions in squares*(*BIT***Vol. 19**,*no. 3*: pp. 297 – 301) (with J. Bohman and C.E. Fröberg)

- 1994:
*Prime Numbers and Computer Methods for Factorization*