777777

This number is a composite.

Single Curio View:   (Seek other curios for this number)
The only six-digit repdigit such that the sum of itself and all truncations of itself minus one, i.e., 777777+77777+7777+777+77+7 - 1 = 864191 is prime. [Bajpai]

Submitted: 2017-04-19 14:02:14;   Last Modified: 2020-06-15 19:52:11.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell