private int exp2() {
    String bin = dec2bin(this.rand((int) Math.pow(2, 32)));
    int count = 0;
    for (int i = 0; i < 32; i++) {
      if (bin.charAt(i) == '0') {
        count++;
      } else {
        break;
      }
    }
    return count;
  }
Create a corpus

@param dirs The directory to store the corpus files
testfuzz/src/main/java/org/hyperledger/besu/testfuzz/javafuzz/Corpus.java