待验证50% 置信事实精确时间
Paul Erdős formally posed the unit distance problem in 1946 and offered a $500 prize for its solution.
1
来源数
50%
置信度
中期 (~90 天)
时效性
2026/7/2
首次发现
有效期至:2026/9/30
来源
相关事实
引用此条事实
Stable URI
https://kongchang.com/claim/50581API
curl https://kongchang.com/api/v1/knowledge/claims/50581MCP
get_claim(id=50581)