Ten primes therefore cannot be achieved with a grid having 7 as the value for 'x'.
7349 5623 8293 5273 4253 2269 8761 7349 8461
1009 1117 1223 2333 1447 1553 1663 1889 1993
2003 8111 1229 6337 5449 1559 1669 2887 1999
1171 9319 1171 1913 9137 1117 7919 7193 7919
3048 203 3272 361 448 951 1319 0 1069 291
The number under each is the number of possible arrangements of primes that would work for that x, when requiring that all the 4-digit primes be different
Edited on July 16, 2023, 11:30 pm
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