Mersenne

1993 OX9. Discovered 1993 July 20 by E. W. Elst at La Silla.

Named for Marin Mersenne (1588-1648), French mathematician and philosopher, best known for his discovery of prime numbers of the form 2n — 1 and that n is then necessarily also prime. The number 8191 = 213 — 1 is the fifth Mersenne prime. Mersenne correctly verified that the numbers are prime also for n = 17, 19 and 31 - and that they are not prime for n = 11, 23 and 29. The largest prime Mersenne correctly established was for n = 127. (M 31612)

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