python check if number is prime

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Kodi4444 answered on June 2, 2021 Popularity 9/10 Helpfulness 5/10

answer python check if number is prime

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python check if number is prime

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import sympy
print(sympy.isprime(433101397415390663))
# output = True

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Tags: python

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Contributed on Jan 29 2023

Kodi4444

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Python code for checking if a number is a prime number

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for i in range(2, 20):
    for x in range(2, i):
        if i % x == 0:
            break
    else:
        print(i, "is a prime number")

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Contributed on Jun 13 2022

OHIOLee

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how to see if a number is prime in python

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def is_prime(n: int) -> bool:
    """Primality test using 6k+-1 optimization."""
    if n <= 3:
        return n > 1
    if n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i ** 2 <= n:
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

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Contributed on Jun 02 2021

Cloudy Caribou

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check for prime in python

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def is_prime(n: int) -> bool:
    """Primality test using 6k+-1 optimization."""
    import math
    if n <= 3:
        return n > 1
    if n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i <= math.sqrt(n):
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

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Source: en.wikipedia.org

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Contributed on Nov 20 2021

Misty Manx

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use a for loop to check if a number is prime in Python

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num = 17
is_prime = f"number {num} is a prime number"
if num < 2:
    is_prime = False
else:
    for i in range(2, num):
        if num % i == 0:
            is_prime = f"number {num} is NOT a prime number"
            break
print(is_prime)

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Tags: for-loop python pyth

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Contributed on Jan 19 2023

Blasian

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python check if number is prime

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