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10-17-1952

D. H. Lehmer announced that 2^n-1 for n = 2203 and 2281 are Mersenne primes. He was aided by a SWAC computer, with the first result taking 59 minutes. SWAC had been built in 1950 in Los Angeles.

More information about:
Derrick H Lehmer
Mersenne Primes
SWAC Computer
Date: 
Friday, October 17, 1952