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is prime in python

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BugsBuggy answered on June 18, 2021 Popularity 10/10 Helpfulness 6/10

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from sympy import isprime
isprime(23)

Popularity 10/10 Helpfulness 6/10 Language python

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Contributed on Jul 28 2022

BugsBuggy

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is prime python

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def is_prime(n):
    for i in range(2,int(n**0.5)+1):
        if n%i==0:
            return False
    return True

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Contributed on May 04 2022

Mouad En-naciry

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is prime python

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import math
def isPrimeNumber(n):
    if (n < 2):
        return False;
    sq = int(math.sqrt(n))
    for i in range(2, sq + 1):
        if (n % i == 0):
            return False
    return True

Popularity 10/10 Helpfulness 8/10 Language python

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Contributed on Oct 29 2021

Sore Stork

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prime number in python

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def prime_number(n):
    c = 0
    for x in range(2, n):
        if n % x == 0:
            c = c + 1
    return c


n = int(input("Enter a number = "))
if prime_number(n) == 0:
    print("Prime number.")
else:
    print("Not prime number.")

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Contributed on May 10 2022

Excited Earthworm

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primes in python

Comments(1)

from math import sqrt
for i in range(2, int(sqrt(num)) + 1):
    if num % i == 0:
        print("Not Prime")
        break
    print("Prime")

# Note: Use this if your num is big (ex. 10000 or bigger) for efficiency
# The result is still the same if the num is smaller

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Contributed on Aug 13 2021

Old-fashioned Ostrich

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python prime number

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def is_prime(n):
	if n == 0 or n == 1 or n == 4:
		return False
	for i in range(2, int(n/2)):
		if n % i == 0:
			return False
	return True

A relatively "faster" prime check.

It gets noticably slow once it gets to 8+ digits.

Popularity 8/10 Helpfulness 7/10 Language python

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Tags: python

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Contributed on Jan 12 2023

OwO People

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prime number in python

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a=int(input('print number:'))
for i in range(2,a):
    if a%i !=0:
        continue
    else:
        print("Its not a prime number")
        break # here break is exicuted then it means else would not be exicuted.
else:
    print("Its a prime number")

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Contributed on Dec 19 2021

Impossible Impala

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prime number in python

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# Python function to check if a number prime or not.
print("Welcome to Prime Number Checker")

def prime_check(number):
    prime = True
    for num in range(2, number):
        if number % num == 0:
            prime = False
    if prime:
        print("It is prime")
    else:
        print("It is not prime")

number_to_check = int(input("Type the number to check: "))
prime_check(number = number_to_check)

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Contributed on Dec 04 2022

Relieved Rattlesnake

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primes pytyhon

Comment

def is_prime(n):
    if n in (2, 3):
        return True
    if n <= 1 or not (n%6==1 or n%6==5):
        return False
    a, b= 5, 2
    while a <= n**0.5:
        if not n%a:
            return False
        a, b = a+b, 6-b
    return True
# this method is much faster than checking every number because it uses the fact
# that every prime is either 1 above or 1 below a multiple of 6
# and that if a number has no prime factors, it has no factors at all

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Contributed on May 17 2022

fmoeran

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prime number in python

Comment

import math
a=[i for i in range(2,int(input('prime number range'))) if 0 not in [i%n for n in range(2,int(math.sqrt(i)))]]
print(a)

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Contributed on Jun 18 2021

Modern Mongoose

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prime number in python

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# This shows how we can use for + else using a break in between

for x in range(1,101):
# if you want to find whether a user input is a prime number
# use the following insted of the first for loop
# x = int(input("Type a number: "))
    for i in range(2, x):
        if x % i == 0:
            print(x, "is not a prime number.")
            break
    else:
        print(x, "is a prime number.")

# This will print all the numbers from 1-100,
# in the same line will print whether it is a prime or not

# if you use the user input method
# when you type 9, the output will be:
# 9 is not a prime number.

# when you type 7, the output will be:
# 7 is a prime number.

Popularity 9/10 Helpfulness 5/10 Language python

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Contributed on Jun 04 2022

Rajitha Amarasinghe

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is prime in python

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