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Puzzle of the Week #553 - Unknown Primes

January 30, 2026 Elliott Line

(2+1/a)(2+1/b)(2+1/c) = d

 a, b, c and d are all prime numbers, what are they?

← Puzzle of the Week #554 - Fiftieth BirthdayPuzzle of the Week #552 - Five Answers →
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