And factorial is you got a number and got all the number since it to under till the 1 and multiply, like 6! is 6x5x4x3x2x1 that is 720. The prime factorial is a number that is near the multiplication of a factorial so resolve will make you see 719 is prime factorial see 4! is 3!x4 so I only hado to do that, I will multiply now of 2 and increasing till got to more next number of the number of the problem, so got the calculator and 2x3x4, lets see the result 24 still low 24x5 is120 still low, 120x6 is 720 so is the factorial more near the 719, so true 719 is a prime factorial because it is one more or one less than one factorial number.
Rute Bezerra de Menezes Gondim
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