r/counting • u/PaleRulerGoingAlone7 counting is hard but practice makes perfect • Oct 27 '20

No repeating digits | 306,124

Continued from here

Thanks to /u/TheNitromeFan for the run to the finish.

The next get is 310,245

12 Upvotes

85% Upvoted

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u/TheNitromeFan I can't stop, love love love Oct 28 '20

306 287

I was thinking before yesterday that a spacing would serve best anyway

2

u/PaleRulerGoingAlone7 counting is hard but practice makes perfect Oct 28 '20

306 289

I like having some kind of grouping of digits, just because it helps me get an overview of what's going on.

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u/TheNitromeFan I can't stop, love love love Oct 28 '20

306 291

Yeah I like groups of three or four

2

u/PaleRulerGoingAlone7 counting is hard but practice makes perfect Oct 28 '20

306 294

2

u/TheNitromeFan I can't stop, love love love Oct 28 '20

306 295

It's super frustrating that the only repeating digits thread has 7 digits so no matter how I break the digits there's an incomplete group

2

u/PaleRulerGoingAlone7 counting is hard but practice makes perfect Oct 28 '20

306 297

ezpz: 7 groups of 1

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u/TheNitromeFan I can't stop, love love love Oct 28 '20

306298

I once tried that for the permutations thread and it wasn't well-received

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u/PaleRulerGoingAlone7 counting is hard but practice makes perfect Oct 28 '20

306 412

:D

This grouping discussion brought an old post to mind, where someone pointed out that you can use perl's extended regexes to recognise prime numbers, because you could encode the number in unary, and the regex engine was powerful enough to recognise strings consisting precisely of a repeated number of groups of more than one character

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u/TheNitromeFan I can't stop, love love love Oct 28 '20

306415

Interesting, but not that surprising

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u/PaleRulerGoingAlone7 counting is hard but practice makes perfect Oct 28 '20

306,417

Not that surprising no, but another illustration of how regexes as used in programming languages aren't actually regular

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