This number is a composite.
The 273rd prime minus sum of gaps between the first 273 consecutive primes minus one equals 273. [Fentsor]
The smallest number n (a composite number) such that 10^n-n^10 is a prime. The next such number, also composite, is 399. [Loungrides]
The smallest of the only two sphenic numbers consisting of distinct prime digits. Note that its prime factors (3, 7, 13), concatenated in reverse order, is prime. [Loungrides]
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell