How they found the World's Biggest Prime Number - Numberphile
MARIN MERSENNE : FIRST SOURCE ON PENDULUM NOTATIONS
THE METRICAL SECOND : IMPORTANT FOR US MUSICIANS TO UNDERSTAND !
He was interested in wide variety of fields. Today, Mersenne is known mainly as mathematician and physicist. He was first who discovered at least partially useful general formula for deriving prime numbers. Mersenne also studied the music theory and developed laws for description of the harmonics of a vibrating string.