20230311, 21:50  #12 
Sep 2017
2^{4}×13 Posts 

20230314, 02:27  #13 
"Ed Hall"
Dec 2009
Adirondack Mtns
1684_{16} Posts 
Well, there you have it! The list is out and I'm not on it, so even though I wrote two separate programs which gave the same answer, I apparently don't know what I'm doing. Whether I will try again in the remaining time is undetermined.

20230314, 12:37  #14 
Jan 2017
2×3×29 Posts 
Note that the list only has solutions up to 20230305 (while having them for every day until then, so not like there would be very few solvers). If you submitted a solution later, it might not show up. Though it is weird that if they post a list of solutions submitted before a particular date, they'd do it so long after that date.

20230314, 13:20  #15  
"Ed Hall"
Dec 2009
Adirondack Mtns
13204_{8} Posts 
Quote:


20230314, 16:34  #16 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
5×29×43 Posts 
Are you accounting for the fact that exceptions can have a digit not 1379 as the last digit or just not be prime? The example makes it look like you just need to try the former.

20230314, 16:54  #17  
"Ed Hall"
Dec 2009
Adirondack Mtns
2^{2}·11·131 Posts 
Quote:
But, I may have been too hasty with my posting here. I was a bit discouraged by the posting and only noticed my omission. Although I saw the last date, it was at a glance and I misread it as May 3 rather than 5 Mar, which which added my misunderstanding. 

20230314, 20:25  #18 
Jan 2017
2·3·29 Posts 

20230314, 23:43  #19 
"Ed Hall"
Dec 2009
Adirondack Mtns
2^{2}·11·131 Posts 
I beg to differ on that point. There is a difference between a prime chain and a chained prime. Both are mentioned, but the solution needs to be a chained prime. I can't see how a chained prime could be other than a prime. But, then again, my name is not listed.

20230315, 01:00  #20 
If I May
"Chris Halsall"
Sep 2002
Barbados
26235_{8} Posts 

20230315, 13:29  #21 
"Forget I exist"
Jul 2009
Dartmouth NS
8,521 Posts 
What we know:

20230315, 17:29  #22  
Jan 2017
AE_{16} Posts 
Quote:
Earlier there was also a remark in parentheses something like "so it'd be called a nonprime nexception chained prime?", making that part even harder to miss, but that extra remark has apparently just been removed. 

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