EntityQ77918· pop 11· linked from 6 articlesErnst JacobsthalSign in to saveGerman mathematician (1882–1965)ConnectionsBerlinEntityprime numberEntityTrondheimEntitymathematicianEntityHumboldt-Universität zu BerlinEntityDoctor of PhilosophyEntityÜberlingenEntitysquare numberEntityTechnische Universität BerlinEntityMathematics Genealogy ProjectEntityFerdinand Georg FrobeniusEntityHermann SchwarzEntityIssai SchurEntityFermat's theorem on sums of two squaresEntityNorwegian Institute of TechnologyEntityJacobsthal numberEntityPaul JacobsthalEntityCategories1882 births1965 deaths20th-century German mathematicians