847
This number is a composite.
Single Curio View: (Seek other curios for this number)
The smallest composite C such that C+10^x is prime for more than five distinct powers: x=1,...,6. [Rivera]
Submitted: 2019-07-09 11:47:28; Last Modified: 2019-07-09 12:35:37.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell