Number of Primes up to n Approximates to Eulerian Logarithmic Integral
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Theorem
The prime-counting function approximates to the Eulerian logarithmic integral:
- $\map \pi n \approx \ds \int_2^n \frac {\d x} {\ln x}$
Proof
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Also see
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $10^{10^{10^{34}}}$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $10^{10^{10^{34}}}$