Table:
Problem size (n+)	Quartic algorithm:compute all D-values	Thresholded algorithm
8	0.05 s	0.07 s
16	0.19 s	0.15 s
32	0.92 s	0.36 s
64	6.16 s	0.61 s
128	53.15 s	2.35 s
256	689.18 s	5.93 s
512	7864.20 s	19.54 s
1024	> 1 d	85.76 s

Transcribe the table into Markdown format.

| Problem size (n+) | Quartic algorithm:compute all D-values | Thresholded algorithm | 
 | --- | --- | --- | 
 | 8 | 0.05 s | 0.07 s | 
 | 16 | 0.19 s | 0.15 s | 
 | 32 | 0.92 s | 0.36 s | 
 | 64 | 6.16 s | 0.61 s | 
 | 128 | 53.15 s | 2.35 s | 
 | 256 | 689.18 s | 5.93 s | 
 | 512 | 7864.20 s | 19.54 s | 
 | 1024 | > 1 d | 85.76 s |