277

This number is a prime.

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3^277-2^277 is the smallest prime greater than a googol of form x^p-2^p, for any prime x. [Loungrides]

The only non-titanic prime formed from a prime number n followed by n 7's, i.e., (n=2). [Loungrides]

The only 3-digit prime that can be represented as sum of a prime number of first n consecutive composite numbers, (n=17), i.e., 4+6+…+26+27. [Loungrides]

The smallest of three non-titanic primes that can be represented as the product of a repdigit number consisting of 5's and all its truncations plus 2, i.e., 55*5+2 = 277. [Loungrides]