Own a number.
Forever. On-chain.
Every positive integer is a unique NFT. Register the number that means something to you — your birthday, your lucky number, a constant of the universe.
Pricing Tiers
| Tier | Range | ETH | USD (approx) |
|---|---|---|---|
| PLATINUM | 1 – 100 | 0.4 ETH | $1,000 |
| GOLD | 101 – 9,999 | 0.2 ETH | $500 |
| PHONE | 10-digit (2–9 prefix) | 0.01 ETH | $25 |
| NOTABLE | 5 – 9 digits | 0.004 ETH | $10 |
| STANDARD | 11+ digits | 0.002 ETH | $5 |
Symbolic Numbers
View all →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.
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.
Moser's Number
Defined using Steinhaus–Moser notation. Astronomically large by everyday standards, yet utterly dwarfed by Graham's Number. Named after Leo Moser.
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.
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.
Notable Reserved Numbers
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