33. A NEW RESULT CONCERNING A MERSENNE NUMBER.—On 2 December 1944 I finished the proof that the Mersenne number M 167 is composite; see MTAC, p. 333. Hence there now remain only four of these numbers M p (p = 193, 199, 227, 229) whose character is unknown. The method of testing primality was the same as that described in Nat. Acad. Sci., Proc., v. 30, Oct. 1944, p. 314-316. HORACE S. UHLER     12 Hawthorne Ave., Hamden 14, Conn.