
Curios:
Curios Search:
Participate: 
The smallest 3digit brilliant number formed from the concatenation of composite digits. Note that its prime factors, (11, 59), create another brilliant number, 1159=19*61, whose prime factors create a third brilliant number, i.e., 649=11*59, 1159=19*61, 1961=37*53. So, 649 is an "extra brilliant number." [Loungrides]
Prime Curios! © 20002018 (all rights
reserved)
