**Marin mersenne** was born on September 8, 1588 in Oize-Maine, France. He died on September 1, 1648 in Paris, France. He is best known for his work of clarification and correspondence between eminent philosophers and scientists, and for his work in Number Theory. Mersenne attended Mans College after which, and from 1604, spent five years at the Jesuit College of La Fleche. From 1609 to 1611 he studied theology at Sorbonne.

He joined the Minims Religious Order in 1611. The name of the Religious Order comes from the fact that Minims hid to the minimum (minimi) of all religious; his life was devoted to prayer, study and schooling. Mersenne continued his education within the Order of Nigeon and later at Meaux. He returned to Paris where in 1612 he became a priest at Place Royale.

He taught philosophy at the Convent of Minim in Nevers from 1614 to 1618. In 1619 he returned to Paris to the Minims de l'Annociade near Place Royale. His cell in Paris became a meeting place for Fermat, PAscal, Gassendi, Roberval, Beaugrand, and others who later became the choir of the French Academy. Mersenne corresponded with other eminent mathematicians and became extremely important in communicating mathematical knowledge across Europe at a time when there were no scientific journals. Mersenne investigated prime numbers and tried to find a formula that represented all prime numbers. Although it failed, your work on the form 2 numbers* ^{no}*-1, has been of continuing interest in the investigation of large-scale prime numbers. Mersenne defended Descartes and Galileo against theological criticism and struggled to expose the pseudo scientists of alchemy and astrology. He continued some of Galileo's work in acoustics and stimulated some of Galileo's discoveries in mechanics. He proposed the use of a pendulum as a temporal mechanism to Huygens, thus inspiring him to construct the first grandfather clock.

In 1633 published **Traité des mouvements**, and in 1634, **Les Méchanique de Galilée**, which was a version of Galileo's dissertations on mechanics. Translated part of **Dialogue** from Galileo to French, and in 1639 published a translation of the **Speech** from Galileo. It was through Mersenne that Galileo's work became known outside Italy.

Two major publications in mathematical physics were **L'Harmonie Universelle** (1636) and **Physico-Mathematica Cogitata** (1644). He also wrote **Traité d'harmonie universelle** (1627), a work on music, musical instruments and acoustics.

After his death letters were found in his cell belonging to 78 different correspondents including Fermat, Huygens, Pell, Galileo and Torricelli.