Stanislas Dehaene, a pioneer in the field of numerical cognition, led a series of such experiments in the early 1990s.
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Before the 20th century, definitions of primality were inconsistent, and significant mathematicians such as Goldbach, Lambert, Legendre, Cayley, and Kronecker wrote that 1 was prime.
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In one of their experiments, students in the École Normale Supérieure were divided into two groups: those in literary studies and those studying mathematics, physics, or biology.
RAM parity | Parity function | Parity Committee for the Reconstruction of the Fourth International | 7% of the country's purchasing power parity |