
Curios:
Curios Search:
Participate: 
The sum of all 3digit PPDI's in base 10 (153, 370, 371, and 407) is prime. [Rupinski]
There are exactly 1301 nonisomorphic trees with thirteen vertices. [Patterson] Bromotrifluoromethane, also known by the trade name Halon 1301, is a colorless, odorless, and nontoxic gas which extinguishes a fire by chemically reacting with the combustion process. It is now known to be environmentally damaging, particularly toward the Earth's protective ozone layer. The only prime (emirp) equal to the sum of all the ndigit Narcissistic numbers (n=3, 153+370+371+407=1301). [Loungrides] The sum of prime factors (with multiplicities) for the middle number in the smallest nontrivial eRAT triple. [Resta]
(There are 3 curios for this number that have not yet been approved by an editor.)
Prime Curios! © 20002017 (all rights
reserved)
