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 2023-04-05, 06:49 #34 Rubiksmath   Sep 2022 12710 Posts My python code terminated with a 28 digit solution in 12 mins. Don't know if it is the true largest but I think the search was exhaustive. Last fiddled with by Rubiksmath on 2023-04-05 at 07:33 Reason: redacted answer, just realised solution not posted yet
2023-04-05, 13:10   #35
henryzz
Just call me Henry

"David"
Sep 2007
Liverpool (GMT/BST)

11000010110012 Posts

Quote:
 Originally Posted by Rubiksmath My python code terminated with a 28 digit solution in 12 mins. Don't know if it is the true largest but I think the search was exhaustive.
That sounds about right for a well coded recursive method on this problem. Mine actually recursed for each digit which will have slowed it down significantly. Loops would be much better.

2023-04-13, 12:06   #36
dudz1978

Apr 2023

1 Posts

Quote:
 Originally Posted by Rubiksmath My python code terminated with a 28 digit solution in 12 mins. Don't know if it is the true largest but I think the search was exhaustive.
My 28 digit solution has md5sum (of decimal text representation) 7371d6ec73eeee81e466cd5ae9723686, is the same of yours? I've send my answer but they didn't put my name. Maybe something wrong with my program. I've send an email asking for solution yesterday, but they didn't reply yet.

2023-04-13, 14:25   #37
henryzz
Just call me Henry

"David"
Sep 2007
Liverpool (GMT/BST)

23·271 Posts

Quote:
 Originally Posted by dudz1978 My 28 digit solution has md5sum (of decimal text representation) 7371d6ec73eeee81e466cd5ae9723686, is the same of yours? I've send my answer but they didn't put my name. Maybe something wrong with my program. I've send an email asking for solution yesterday, but they didn't reply yet.
That matches my solution.

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