Lucas–Lehmer primality test
Test if a Mersenne number is prime / From Wikipedia, the free encyclopedia
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This article is about the Lucas–Lehmer test that applies only to Mersenne numbers. For the Lucas–Lehmer test that applies to a natural number n, see Lucas primality test. For the Lucas–Lehmer–Riesel test, see Lucas–Lehmer–Riesel test.
In mathematics, the Lucas–Lehmer test (LLT) is a primality test for Mersenne numbers. The test was originally developed by Édouard Lucas in 1878[1] and subsequently proved by Derrick Henry Lehmer in 1930.