101
This number is a prime.
Just showing those entries submitted by 'Haga': (Click here to show all)
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]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell