# Fermat's theorem on sums of two squares

> theorem that an odd prime is a sum of two squares iff it is of the form 4𝑛+1

**Wikidata**: [Q914517](https://www.wikidata.org/wiki/Q914517)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Fermat's_theorem_on_sums_of_two_squares)  
**Source**: https://4ort.xyz/entity/fermat-s-theorem-on-sums-of-two-squares


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)