# Mathematician:Harry Lewis Nelson

## Mathematician

American mathematician and computer programmer.

Member of the team that won the World Computer Chess Championship in $1983$ and $1986$.

Co-discoverer with David Slowinski of the $27$th Mersenne prime $2^{44 \, 497} − 1$ in $1979$.

Editor of the Journal of Recreational Mathematics for five years.

Discovered the $10$-digit pluperfect digital invariant $4 \, 679 \, 307 \, 774 = 4^{10} + 6^{10} + 7^{10} + 9^{10} + 3^{10} + 0^{10} + 7^{10} + 7^{10} + 7^{10} + 4^{10}$.

American

## History

• Born: 8th Jan 1932

## Publications

• 1980 - 1981: A Solution to Archimedes' Cattle Problem (J. Recr. Math. Vol. 13: 162 – 176)
• 1988: A Consecutive Prime $3 \times 3$ Magic Square (J. Recr. Math. Vol. 20: 214 – 216)