Guess the prime factors of the blue number. Use the red slider to check your answer. Slide NewNumber to generate a new number between 2 and 256.

Play with a friend.[br][br]Revised: [url=http://tube.geogebra.org/m/22178]Terry Lee Lindenmuth — November 16, 2012 - 2:40 PM[/url][br][br]Primes not available: 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 241, 251