I am sure there are other more subtle ways to go about it but this seems about as fast as I can make it for a general brute-force solution (0.11s)
This one seems to work for the large test case, too, although it is not a general solution [for size(p,1)>100 it only tests corner points].
Project Euler: Problem 6, Natural numbers, squares and sums.
Vectorize the digits of an Integer
Insert zeros into vector
User defined nextpow function
Vector Linear sum: (p1-m1)V1+(p2-m2)V2+...(pK-mk)Vk
GJam 2015 Rd1B: Noisy Neighbors
GJam 2014 China Rd A: Library Sorting (Small)
Hamming Weight - Size Scoring
GJam 2014 China Rd A: Maze with a Left Hand Rule
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