John Edensor Littlewood was a prominent British mathematician known for his contributions to various fields, including analysis, number theory, and mathematical logic. Born on June 9, 1885, he worked closely with G.H. Hardy, another influential mathematician, and they collaborated on several important mathematical theories. Littlewood is best remembered for his work on the Littlewood's conjecture and the Littlewood-Paley theory, which have had a lasting impact on modern mathematics. He also made significant advancements in the study of prime numbers and series, helping to shape the landscape of mathematical research in the 20th century.