Expired50% confidenceFactExact time
When Erdős posed the planar unit distance conjecture in 1946, he offered a $500 prize for its solution.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Related Claims
UnverifiedPaul Erdős formally posed the unit distance problem in 1946 and offered a $500 prize for its solution.82% similarUnverifiedErdős以提出大量简洁却极难解决的猜想而著称，这些猜想以悬赏金形式激励数学界，金额从25美元到10000美元不等60% similarUnverifiedErdős established monetary prizes ranging from $25 to $10,000 for certain mathematical problems, and after his death a fund managed by Ronald Graham and others continued to honor the rewards.59% similarUnverifiedDevin is priced at $500 per month.53% similarUnverifiedThe author spent $60 to conduct a comparative evaluation of three AI coding tools: Cursor, Claude Code, and Windsurf.51% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/51618API
curl https://kongchang.com/api/v1/knowledge/claims/51618MCP
get_claim(id=51618)