# Heegner number

> square-free positive integer such that the corresponding imaginary quadratic field has unique factorization; one of 1, 2, 3, 7, 11, 19, 43, 67, or 163

**Wikidata**: [Q1322644](https://www.wikidata.org/wiki/Q1322644)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Heegner_number)  
**Source**: https://4ort.xyz/entity/heegner-number


## References

1. Freebase Data Dumps. 2013