Underworld

Though shrouded in mystery, this much is known about the Valenzetti Equation: it is a mathematical calculation designed to predict nothing less than the exact number of years left before the extinction of the human race.

According to the 1975 orientation film in the Sri Lanka Video, the Valenzetti Equation "predicts the exact number of years and months until humanity extinguishes itself." During the video, Alvar Hanso also states that the radio transmitter on the Island, will "broadcast the core numerical values of the Valenzetti Equation."

The numbers, 4, 8, 15, 16, 23 and 42, are explained in the Sri Lanka Video, as the numerical values to the core environmental and human factors of the Valenzetti Equation. Alvar Hanso also states in the video that the purpose of the DHARMA Initiative is to change the numerical values of any one of the core factors in the equation in order to give humanity a chance to survive by, effectively, changing doomsday.