Mersenne prime

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Mersenne prime

[mər′sen ¦prīm]
(mathematics)
A Mersenne number that is also a prime number.
References in periodicals archive ?
Computer scientists uncovered the 32nd Mersenne prime number, the largest prime yet discovered (141: 213).
The previous largest-known Mersenne prime number was discovered in 1985 during a similar test of a Cray Research system at Chevron Information and Technology Company, Houston.