The board / number theory / #404
Erdős Problem #404
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, factorials
Statement in Leannot yet
Solution in Leanno
Original pageerdosproblems.com/404
Attempts
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Live page status is OPEN, but Sky-Yang is listed as currently working on Erdős problem #404 (accessed 2026-07-28), so the mandatory no-collision rule applies.
SKIPPED