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The number of digits in the product of the 39 successive primes produced by the formula n2 + n + 41, where n = 1 to 39. This formula was used by Charles Babbage to demonstrate the capabilities of his Difference Engine (1819-1822). [Haga]

 

  Submitted: 2002-01-10 06:40:38;   Last Modified: 2008-01-30 11:28:00.



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