@nguyen.edit11: Graham's number is a massive finite upper bound in Ramsey theory, defined using Knuth's up‑arrow notation; it is so large that the observable universe cannot contain its decimal digits, and it was introduced by mathematician Ronald Graham. Origin Ronald Graham introduced the number in the 1970s while studying a problem about edge‑colorings of high‑dimensional hypercubes.1 Definition The sequence starts with g₁ = 3↑↑↑↑3, and each subsequent term gₙ uses the previous value as the number of arrows: gₙ₊₁ = 3↑^{gₙ}3; Graham’s number is g₆₄.1 Size Even the first term g₁ is far larger than a googolplex, and g₆₄ is so vast that the observable universe lacks enough space to write its digits.1 Last digits Although the full number cannot be written, its final ten digits are known: 2464195387.1#nobita #chaien #suneo

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Wednesday 05 August 2026 04:03:23 GMT