Most decimal digits memorized in one hour
- Who
- Ryu Song I
- What
- 4,620 total number
- Where
- China (Wuhan)
- When
- December 2019
The most decimal digits memorized in one hours is 4,620, and was achieved by Ryu Song I (North Korea), at the 2019 World Memory Championships in Wuhan City, Hubei, China from 4 to 8 December 2019.