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Search: Posts Made By: axn
Forum: Puzzles 2020-08-30, 15:09
Replies: 20
Views: 3,505
Posted By axn
No need to brute force. R.Gerbicz already showed...

No need to brute force. R.Gerbicz already showed big numbers, but basically, using the periodicity of residues, we can iteratively improve a record.

For example:
...
Forum: Puzzles 2020-08-30, 14:17
Replies: 20
Views: 3,505
Posted By axn
This approach is not going to work. If we...

This approach is not going to work.

If we consider n lower order digits, they cycle with a periodicity 5^(n-1). So you need to find an n such that all 5^(n-1) residues turn up bad -- then that...
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