43143...00193 (38-digits)

This number is a prime.

43143988 3273989572 7934241975 0374600193

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The smallest Leyland prime (i.e., of the form x^y + y^x, where x and y are natural numbers, 1 less than x less than or equal to y) with x and y both composite numbers (x=15, y=32). [Beedassy]

Submitted: 2006-09-21 00:57:52; Last Modified: 2008-08-01 12:44:43.