calculate the factors of a positive integer number

**ATB** · March 16th, 2014, 07:39 PM

lines 7, 8, &12 "primes" are underline in red (prime cannot be resolved) is what pops up when i hover over the x's.
i don't get why that is.

package assignment7;
 
public class Exercise3 
{
	public static void main(String[] args) 
	{
		Prime.setSize(1000);
		for (int p = Primes.next(); p < 30; p = Primes.next()) 
		{
			int n = (int)Math.round(Math.pow(2,p)) - 1;
			System.out.printf("%d\t2^%d-1%d", p, p, n);
		if (Primes.isPrime(n)) 
		{
			System.out.println(" is prime ");
		} else 
		{
			System.out.println(" is not prime ");
		}
		}
	}
}

**jashburn** · March 16th, 2014, 07:48 PM

This means the class/object Prime and Primes cannot be found. You may need to write them yourself, or they may have already been provided to you.

Cross-posted at http://www.java-forums.org/new-java/...er-number.html

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