# Mathematician:R.E. Powers

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## Mathematician

American amateur mathematician who discovered the $10$th and $11$th Mersenne primes $2^{89} - 1$ (in $1911$) and $2^{107} - 1$ (in $1914$.)

In $1916$, he determined that $2^{241} - 1$ is composite.

Very little is known about **R.E. Powers**. He lived in Denver, Colorado from at least 1911 to 1916.

## Nationality

American

## History

- Born: Unknown
- Died: Unknown

## Publications

- Nov. 1911:
*The Tenth Perfect Number*(*Amer. Math. Monthly***Vol. 18**,*no. 11*: pp. 195 – 197) in which $M_{89}$ is reported as being prime

- 1914:
*On Mersenne's Numbers*(*Proceedings of the London Mathematical Society***Ser. 2****Vol. 13**: p. xxxix) in which $M_{107}$ is reported as being prime

- 1916:
*Certain Composite Mersenne's Numbers*

- 1934:
*Note on a Mersenne Number*(*Bull. Amer. Math. Soc.***Vol. 40**: p. 883) in which $M_{241}$ is reported as being composite

## Sources

Chris Caldwell's website The Prime Pages.