Divide it with primes less than half of the number.
59
What is the greatest prime you must consider to test whether 2834 is prime?
All even numbers are composite except 2 itself which is a prime number because it has only two factors which are itself and one.
on my test it said is 1.68 a prime number i sed yes but it was no :(
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?"
53
59
To determine if 2558 is a prime number, you would typically test divisibility by numbers up to the square root of 2558. The square root of 2558 is approximately 50.58. Therefore, you would test divisibility by prime numbers up to 51. The greatest prime number less than or equal to 51 is 47, so you would test divisibility by 47 to determine if 2558 is a prime number.
What is the greatest prime you must consider to test whether 2834 is prime?
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.
You don't have to test anything. Any number greater than 5 that ends in 5 is composite.
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.
All even numbers are composite except 2 itself which is a prime number because it has only two factors which are itself and one.
It is 149 because as a product of its prime factors: 7*149 = 1043
on my test it said is 1.68 a prime number i sed yes but it was no :(
You have to take the square root of the number (= 59,99) ==> You have to test all prime numbers smaller than 59,99. You will have to test these numbers: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59
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?"