Prime-Counting Function/Examples/16
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Definition
The value of the prime-counting ($\pi$) function for $16$ is determined as follows.
The prime numbers less than $16$ are:
- $2, 3, 5, 7, 11, 13$
Hence:
- $\map \pi {16} = 6$
Sources
- 2008: David Joyner: Adventures in Group Theory (2nd ed.) ... (previous) ... (next): Chapter $2$: 'And you do addition?': $\S 2.1$: Functions: Ponderable $2.1.1$