Solution code: The eight digits along the diagonal marked "P" starting at r8c9 working up to r1c2.
on 7. April 2026, 18:57 by itsid
sheeesh, finally...
now my ears are bleeding from all the thinking *gg*
No that was really really hard, and as you might have expected I neeeded to bifurcate in order to get the solution.
The window within the prime needed to be was narrow, so this time I (after getting the main diagonals 'optionalised' cared about removing the "those numbers do not make a number I like" digits from the P diagonal...
But boy oh boy that nut nearly took my tooth out.
Thanks for the puzzle, it was fun to try.
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I salute you, soldier. thank you for the solve
on 7. April 2026, 17:21 by itsid
nooooooo... sh17 :( I was sooo confident the first time... aaand not a prime (35) so I backtracked aaaand not a prime again (33) I think I need to try again one other time :-(
on 3. April 2026, 16:25 by 6rank
Thank you for this puzzle, though I would say it belongs into the category - don't try this at home :)
I used AI to solve it. That is putting the letters A and I in cells, where certain digits go in one or the other variation.
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Haha, you had me for a second there. good strategy
on 2. April 2026, 21:37 by War
Hmmm, Break-in was the same as the previous one. The tough part was solving the prime without bifurcating, but even if you only bifurcate the right digit(s) one time you will solve.
on 1. April 2026, 12:53 by Justalilguy
I have done it but at what cost...