11010...10001 (39-digits)

This number is a prime.

110100000 0101011111 1000101001 1001110001

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The smallest number that is prime for bases 2, 3, 4, 5, 6, 7, 8, 9 and 10. [Carmody and Alpern]

Submitted: 2006-05-14 17:48:41; Last Modified: 2009-05-26 19:44:24.