Their are many ways one that some times works is test those answers if prime are Mersenne primes. Or you could Google"Is (put the questionable number here)prime?"
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What is the greatest prime you must consider to test whether 2834 isβ prime?
Divide it with primes less than half of the number.
on my test it said is 1.68 a prime number i sed yes but it was no :(
The answer depends on whether or not the prime number is a factor of the other number.If the prime number is a factor of the other number then the GCF is the prime, otherwise the GCF is 1.
If its divisible by 2 then it's not a prime number. But 2 by itself is a prime number
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You only need to test numbers up to the last prime number equal to or less than the square root of a number when testing whether it is prime. The square root of 854 is between 29 and 30, so you would test up to the prime number 29.
What is the greatest prime you must consider to test whether 2834 isβ prime?
A prime number is a positive integer with two factors: one and the number itself. If you test the numbers up to the square root and your number is not divisible by any of them, it's prime.
A primality test is an algorithm for determining whether an input number is prime, but I'm willing to bet that a lot of mathematicians type "prime number calculator" into their web browsers.
You don't have to test anything. Any number greater than 5 that ends in 5 is composite.
A prime number is a positive integer with two factors: one and the number itself. If you test the numbers up to the square root and your number is not divisible by any of them, it's prime.
if it has no other number that can divide into itself but itself ================================== Another contributor clarified: You have to determine whether there is any number ... besides '1' and the number under test itself ... that can divide evenly into the number under test. If you find even one, then it's not a prime. If there are none, then it's a prime.
It is a prime number, because it has no factors. For numbers up to 120, it is enough to test whether the number is divisible by 2, 3, 5, and 7.
To determine if 6437 is prime, you only need to test prime numbers up to the square root of 6437, which is approximately 80.2. Therefore, the greatest prime number you must consider testing is 79. If 6437 is not divisible by any prime numbers up to 79, then it is a prime number.