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4,294,967,297 is the fifth Fermat number, equal to $$2^{2^5} + 1$$. It was proven to be composite by Euler in 1732, disproving Fermat's conjecture that all numbers of the form $$2^{2^n} + 1$$ are prime. It can be factored into 641*6700417.[1]

## Approximations

Notation Approximation
Arrow notation $$2\uparrow32 + 1$$ (exact)
Scientific notation $$4.2964967297\times10^9$$ (exact)
Steinhaus-Moser Notation 10[3]
BEAF {2, 32}
Hyperfactorial array notation 13!
Hardy hierarchy $$H_{\omega^2}(27)$$
Fast-growing hierarchy $$f_2(27)$$
Slow-growing hierarchy $$g_{\omega^{\omega^5}}(2)$$

## Sources

https://en.wikipedia.org/wiki/Fermat_number

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