perplexus.info :: Numbers : 1 is one of them

1 is one of them (Posted on 2017-03-25)

There are 3 known numbers that are repunits at least in four bases.

1. The title mentions one of them.
2. Please find the other two without referring to Google, OEIS et al.
3. Limit your search up to 9999.
4. Looking for the "fourth" would be exercise in futility.

No Solution Yet Submitted by Ady TZIDON

No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)

re: computer solution / OEIS

Comment 2 of 2 |

(In reply to computer solution by Charlie)

https://oeis.org/A119598

There may be others but they would be beyond practical for a brute force program.

Posted by Jer on 2017-03-25 17:18:15

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (7)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info