Symbolic Numbers
Five numbers so large they cannot be expressed as a standard integer. Each exists as a unique Platinum-tier NFT on the Number Registry.
Registration price: 0.4 ETH per symbolic number
Graham's Number
Once the largest number ever used in a mathematical proof. So incomprehensibly vast that even a googolplex is negligible by comparison. It cannot be expressed in standard notation; even writing the number of digits would require more space than the observable universe.
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TREE(3)
A number so unimaginably large it dwarfs Graham's Number in the same way a grain of sand dwarfs the observable universe. It arises from a deceptively simple combinatorial tree-sequence problem posed by Harvey Friedman.
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Moser's Number
Defined using Steinhaus–Moser notation. Astronomically large by everyday standards, yet utterly dwarfed by Graham's Number. Named after Leo Moser.
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Googol
10¹⁰⁰ — a 1 followed by 100 zeros. The word "googol" was coined by nine-year-old Milton Sirotta in 1920, and later inspired the name of a certain search engine.
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Googolplex
10^(googol). A 1 followed by a googol of zeros. There is not enough space in the observable universe to write it out, even with one digit per Planck volume.
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