
Curios:
Curios Search:
Participate: 
9985*720^2329+1 is prime. Note that 9985 is a Chiliagonal number and 720=6!. Also the sum of digits as well as the sum of squared digits of 9985*720^2329+1 are both prime. [Earls]
Prime Curios! © 20002018 (all rights
reserved)
