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The Boeing 757 has the lowest operating cost per seat-mile of any single-aisle jetliner in its class and a lower cost per trip than any twin-aisle airplane.

The smallest palindromic prime that remains prime when its leading digit is replaced by any nonzero digit that is a power of two. [Russo]

The largest of three 3-digit palindromic primes that are not the sum of consecutive composite numbers. The other two are 313 and 383. [Loungrides]