All statistics are based on contigs of size >= 500 bp, unless otherwise noted (e.g., "# contigs (>= 0 bp)" and "Total length (>= 0 bp)" include all contigs).
Suggestion: assemblies ABySS_k96, ABySS_k128, a5-miseq, velvetopt_data_97 contain continuous fragments of N's of length >= 10 bp. You may consider rerunning QUAST using --scaffolds (-s) option!

Assembly           # misassemblies      # relocations      # translocations      # inversions  # misassembled contigs  Misassembled contigs length  # local misassemblies  # unaligned mis. contigs  # mismatches  # indels      # indels (<= 5 bp)      # indels (> 5 bp)  Indels length
ABySS_k96          0                0                  0                     0                 0                       0                            1                      0                         7             15        12                      3                      39           
ABySS_k128         0                0                  0                     0                 0                       0                            0                      0                         5             15        11                      4                      119          
a5-miseq           1                1                  0                     0                 1                       267106                       1                      0                         7             22        15                      7                      176          
megahit            0                0                  0                     0                 0                       0                            0                      0                         2             13        11                      2                      28           
SPAdes_def         0                0                  0                     0                 0                       0                            0                      0                         7             17        13                      4                      104          
velvetopt_data_97  0                0                  0                     0                 0                       0                            0                      0                         4             17        13                      4                      143          
idba_ud            0                0                  0                     0                 0                       0                            0                      0                         3             15        12                      3                      95           
omega              4                2                  2                     0                 4                       365987                       4                      0                         25            14        9                       5                      68           
sga                0                0                  0                     0                 0                       0                            0                      0                         4             38        36                      2                      54           
