12255...55221 (25-digits)
This number is a prime.
12255 5558888188 8855555221
A curious dihedral prime with 5^2 digital length and 5^3 digital sum. [Patterson]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
12255 5558888188 8855555221
A curious dihedral prime with 5^2 digital length and 5^3 digital sum. [Patterson]