This is cutadapt 2.8 with Python 3.7.4 Command line parameters: -a C{9} -m 20 -o TP5.trim.fastq TP5.fastq Processing reads on 1 core in single-end mode ... Finished in 1.85 s (19 us/read; 3.14 M reads/minute). === Summary === Total reads processed: 96,931 Reads with adapters: 16,324 (16.8%) Reads that were too short: 1,670 (1.7%) Reads written (passing filters): 95,261 (98.3%) Total basepairs processed: 5,912,791 bp Total written (filtered): 5,563,606 bp (94.1%) === Adapter 1 === Sequence: CCCCCCCCC; Type: regular 3'; Length: 9; Trimmed: 16324 times; Reverse-complemented: 0 times No. of allowed errors: 0-9 bp: 0 Bases preceding removed adapters: A: 48.6% C: 0.0% G: 16.2% T: 35.1% none/other: 0.1% Overview of removed sequences length count expect max.err error counts 3 1565 1514.5 0 1565 4 886 378.6 0 886 5 734 94.7 0 734 6 587 23.7 0 587 7 522 5.9 0 522 8 430 1.5 0 430 9 384 0.4 0 384 10 356 0.4 0 356 11 421 0.4 0 421 12 375 0.4 0 375 13 397 0.4 0 397 14 389 0.4 0 389 15 350 0.4 0 350 16 391 0.4 0 391 17 366 0.4 0 366 18 368 0.4 0 368 19 367 0.4 0 367 20 338 0.4 0 338 21 337 0.4 0 337 22 365 0.4 0 365 23 325 0.4 0 325 24 317 0.4 0 317 25 346 0.4 0 346 26 317 0.4 0 317 27 310 0.4 0 310 28 296 0.4 0 296 29 281 0.4 0 281 30 288 0.4 0 288 31 251 0.4 0 251 32 258 0.4 0 258 33 237 0.4 0 237 34 254 0.4 0 254 35 247 0.4 0 247 36 195 0.4 0 195 37 186 0.4 0 186 38 167 0.4 0 167 39 151 0.4 0 151 40 154 0.4 0 154 41 146 0.4 0 146 42 144 0.4 0 144 43 154 0.4 0 154 44 153 0.4 0 153 45 144 0.4 0 144 46 149 0.4 0 149 47 159 0.4 0 159 48 162 0.4 0 162 49 123 0.4 0 123 50 85 0.4 0 85 51 75 0.4 0 75 52 67 0.4 0 67 53 46 0.4 0 46 54 67 0.4 0 67 55 43 0.4 0 43 56 23 0.4 0 23 57 23 0.4 0 23 58 16 0.4 0 16 59 11 0.4 0 11 60 11 0.4 0 11 61 15 0.4 0 15