Congratulations on finding a solution!
If you are using JMP 14, you might want to try a the following column formula in your table. Since you said you have limited memory, and a crash is possible, save anything important first.
Std Dev( Current Data Table()[Row(), Index( c1, c2 )] )
where c1 is the first column and c2 the last, for example 6, 118005.
If there is no crash, I would remove the formula.
BTW, the stacked table is likely more efficient for summarizing. Just posing a possible alternative.