galois.prev_prime

class galois.prev_prime(n)

Returns the nearest prime \(p\), such that \(p \le n\).

Parameters

n (int) – A positive integer.

Returns

The nearest prime \(p \le n\).

Return type

int

Examples

In [608]: galois.prev_prime(13)
Out[608]: 13

In [609]: galois.prev_prime(15)
Out[609]: 13