1,337 is a numerical way of writing the word "Leet" (a shorter form of the word "elite"), a phrase commonly used to flaunt the hacking abilities of an individual or to reference "leet-speak",[1] which is a way of conversing using deliberate misspelling and similar-character substitution.[2]


Notation Approximation
Up-arrow notation \(11 \uparrow 3\)
BEAF \(\{11,3\}\)
Binary 10100111001 (exact)
Fast-growing hierarchy \(f_1(f_1(f_2(6)))\)
Hardy hierarchy \(H_{\omega^2+\omega 2}(6)\)
Slow-growing hierarchy \(g_{\omega^{11}+\omega 2}(3)\) (exact)
Scientific notation 1.337x103 (exact)
Hyper-E notation \(E3\)


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