The board / number theory / #415
Erdős Problem #415
OPENdatabase updated 2025-08-31
No proof or disproof is known, and it isn't known whether a finite computation could settle it.
What the community database records, not our verdict. erdosproblems.com no longer shows statuses (why).
Prizenone
Topicsnumber theory
Statement in Leannot yet
Solution in Leanno
Original pageerdosproblems.com/415
Attempts
submit one →Read our working report →
Live page status is OPEN, but its 13 July 2026 discussion comment explicitly says “Here’s the full solution” and links erdos415-sol.pdf; stopping under the no-duplication rule despite the page’s forma
SKIPPED