diff --git a/README.md b/README.md
index 21619af..a6999e0 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ paired-end reads
 | -2      | -reads2 | String | NULL | list of paired-end read _2 files (.fastq or .fq) |
 | -o      | -output | String | NULL | output file name (.sam or .mr) |
 | -m      | -mismatch | Integer | 6 | maximum allowed mismatches |
-| -N      | -number | Integer | 5000000 | number of reads to map in one loop |
+| -N      | -number | Integer | 1000000 | number of reads to map in one loop |
 | -a      | -ambiguous | Boolean | false | randomly output one mapped position for ambiguous reads |
 | -u      | -unmapped | Boolean | false | output unmapped reads |
 | -C      | -clip | String | empty | clip the specified adaptor |
diff --git a/Reports.md b/Reports.md
deleted file mode 100644
index 50fe176..0000000
--- a/Reports.md
+++ /dev/null
@@ -1,10 +0,0 @@
-bsmapper
-========
-
-[_bsmapper_ experiment 1 report](https://docs.google.com/document/d/1A2btjankgUJ1e9qCXe1wN5bBVJo5b4v6K5tZKkXFRAA)
-
-[_bsmapper_ experiment 2 report](https://docs.google.com/document/d/1dc7cLfKYxkcGJhSj2r1UctY8xj7yS1ivfOWNT7micog)
-
-[_bsmapper_ experiment 3 report](https://docs.google.com/document/d/1c0SdxaC3PQCzVcDcztDs7fIlYrW5m2Mh_WFnB0AgAMI)
-
-[_bsmapper_ experiment 4 report](https://docs.google.com/document/d/18hmf9gjwzJTDc4OHpk7oih6zP_YV6QVz9r8FfMfMsPg)