@navlegniv: Graham's number (Graham 's number is a gigantic number that is an upper bound for the solution of a certain problem in Ramsey theory . It is a very large power of three, written using Knuth notation . Named after Ronald Graham . It became known to the general public after Martin Gardner described it in his "Mathematical Games" column in Scientific American in November 1977 , where he said: "In an unpublished proof, Graham recently established a bound so large that it holds the record for the largest number ever used in a serious mathematical proof ." In 1980, the Guinness Book of World Records repeated Gardner's claims, further fueling public interest in the number. Graham's number is an unimaginable number of times larger than other well-known large numbers, such as a googol , a googolplex , and even larger than Skewes' number and Moser's number . The entire observable universe is too small to contain the ordinary decimal notation of Graham's number (each digit is assumed to occupy at least the Planck volume ). Even power towers of the form a b c ⋅ ⋅ ⋅ {\displaystyle a^{b^{c^{\cdot ^{\cdot ^{\cdot }}}}}}are useless for this purpose (in the same sense), although the number can be written using recursive formulas such as Knuth notation or equivalent, which is what Graham did. The last 500 digits of Graham's number are #tcc #tobelo #indonesia #muslim

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Monday 10 August 2026 08:52:22 GMT