Delve into the final lecture of a four-part series on prismatic cohomology, presented by Johannes Anschütz from the University of Bonn. Explore the advanced mathematical concept of the prismatic logarithm, a crucial tool in understanding prismatic cohomology. Build upon the knowledge gained from previous lectures on prismatic cohomology in different characteristics, general results, and prismatization. Gain insights into this cutting-edge area of mathematics developed by Bhatt and Scholze, expanding your understanding of algebraic geometry and number theory. Engage with complex mathematical ideas presented by an expert in the field during this 1 hour and 37 minute lecture from the Institut des Hautes Etudes Scientifiques (IHES).