python generate prime numbers code example

Example 1: python calculate prime numbers until numer

until = 20
[n for n in range(2, until) if all(n % m != 0 for m in range(2, n-1))]

Example 2: generate random prime number python

import sympy

primeNumber = sympy.randprime(min, max)

Example 3: the list of prime number in a given range python

n=int(input("Enter the number till you want to check: "))
primes = []
for i in range (2, n+1):
    for j in range(2, i):
        if i%j == 0:
            break
    else:
        primes.append(i)
print(primes)

Example 4: python - prime number generator

# Prime number generator
def prime_generator(end):
    for n in range(2, end):     # n starts from 2 to end
        for x in range(2, n):   # check if x can be divided by n
            if n % x == 0:      # if true then n is not prime
                break
        else:                   # if x is found after exhausting all values of x
            yield n             # generate the prime


g = prime_generator(1000)       # give firt 1000 prime numbers
print(list(g))

Example 5: list of prime numbers in python

n = 20
primes = []

for i in range(2, n + 1):
	for j in range(2, int(i ** 0.5) + 1):
 		if i%j == 0:
 			break
	else:
		primes.append(i)

print(primes)

Example 6: python generator prime numbers

# effiecent and fast way to generate prime numbers
def primeCheck(n):
    if n == 1 or n == 0 or (n % 2 == 0 and n > 2):
        return False
    else:
        for o in range(3, int(n ** (1 / 2)) + 1, 2):
            if n % o == 0:
                return False
        return True


for a in range(2**15):
    if primeCheck(a):
        prime_numbers.append(a)