Frequently Asked Questions
Can I submit grids larger than 20*20 ?
At this moment, we decided to limit the size to 19*19, since 10^19 is
lower than 2^64, and also because the PHP scorer is slow on large grids.
If it appears that the contest seems too easy, we'll increase the upper limit.
Is 1 prime ?
No, 1 is not prime.
My score doesn't match yours ?
One number may have passed through the pseudo-primality checked on large grids.
For part 2, every even digit gives one extra point, even if the digit is repeated several times.
Can I submit known grids ?