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4. April 2021 mozgan   

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Find Nth Prime

This algorithm finds the $N$th prime number:

#!/usr/bin/env python3
import math
def is_prime(n):
    if (n < 2) or (n % 2 == 0):
        return False
    elif n == 2 or n == 3:
        return True
    k = int(math.sqrt(n))
    for i in range(3, k+1, 2):
        if n % i == 0:
            return False
    return True
if __name__ == '__main__':
    n = int(input())
    cnt = 1
    if n == 1:
        i = 1
        while (True):
            i += 2
            if is_prime(i) == True:
                cnt += 1
                #print(i) # -> gives full list upto nth prime
                if cnt == n:
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