Question Number 10050 by ridwan balatif last updated on 22/Jan/17

h ow do we know 2017 and another number is a prime number?

Commented byprakash jain last updated on 22/Jan/17

2017 is a prime number. Since it has only two factors 1 and 2017.

Commented byridwan balatif last updated on 22/Jan/17

i mean, example 3571 is prime number or not? if prime number, how can we know 3571 has 2 factor 1 and 3571? if not a prime number, how can we know that?

Commented bymrW1 last updated on 22/Jan/17

there is no general way or even a formula to check if a number is a prime number. in internet you may find tools which can help you to check if a number is prime or which factors it has. i personally use a free app called ′Big Integer Calculator′ for this purpose.

Commented bymrW1 last updated on 22/Jan/17