71211211111111111111
This number is a prime.
7121121111 1111111111
Single Curio View: (Seek other curios for this number)
The largest prime less than a googol whose sum and product
of digits are equal to the same perfect number. [Loungrides]
Submitted: 2014-11-14 19:26:07; Last Modified: 2020-05-13 01:00:21.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell