Click the green flag and type the number you want factored. It will say "X has Y factors" when it's done. The factors will appear as pairs Ex: on 10 the second item will be 2 x 5. This makes the calculator faster so it only has to calculate up to the square root of a number. Try 60, 120, 240, 480, 960, etc.
only one thing it does not say "Error" just says "X is a prime number" There is a bug with 2,not saying 2 is prime, and saying it has 4 factors, but perfectly shows 1 x 2 and 2 x 1 only. Tests: 1000 - 0.006 sec. 80000 - 0.011 sec. 10 million - 0.051 sec. some 14-digit number - about 100 sec. 20-digit number - about 75,000 seconds 10 billion - 1.65 sec. 13-digit number - 35 sec.
