Christian Goldbach was an 18th-century mathematician from Prussia, best known for his work in number theory. He was born on March 18, 1690, and became a prominent figure in mathematics, particularly for his famous conjecture regarding prime numbers. Goldbach's conjecture suggests that every even integer greater than two can be expressed as the sum of two prime numbers. Goldbach corresponded with other notable mathematicians of his time, including Leonhard Euler. His conjecture has intrigued mathematicians for centuries and remains unproven, despite extensive research. Goldbach's contributions to mathematics have left a lasting legacy, influencing the study of prime numbers and number theory.