Problems & Puzzles: Puzzles

Puzzle 1085 A follow-up to Puzzle 1079

Last week we updated the solutions to Puzzle 1079 with four improvements by Giorgio Vecchi to the previous solutions sent by Dmitry Kamenetsky

The current solutions status is this one:

n prime, Author Prime, Vecchi
2 23, RK  
3 31, RK  
4 41, DK  
5 47, DK 53, GV
6 59, DK 61, GV
7 67, DK 73, GV
8 79, DK 89, GV
9 97, DK  

Q. Can you confirm that all these solutions are optimals (in bold letters) or send your own improvements?

 


The only contribution came on May 12, 2022, from Giorgio Vecchi who found the optimal solution for n=10 and p=103:

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