In the previous log Aiming for w27 I tell how the scanning was performed. 3489660928 bytes (3.5GB) were generated by two 12-threads computers in scalar mode... Here are the results!

Let's start with the basics: the sum.

$ ./dump7ck -S log.27.p7k opened log.27.p7k Sum =9007199321849850

We would expect this value:

$ echo $(( 2**((2*27)-1) + 2**(27-1) -1 ))9007199321849855

Pretty close ! There is a very very small difference, but it's still here.

Now let's fuse all the semi-arcs...

```
LOOP FOUND: len=545890867990900 arcs=8134767 at 134217705
LOOP FOUND: len=545890867990900 arcs=8136577 at 134217724
LOOP FOUND: len=272945433995450 arcs=4068239 at 134217710
LOOP FOUND: len=545890867990900 arcs=8134487 at 134217718
LOOP FOUND: len=545890867990900 arcs=8130516 at 134217723
LOOP FOUND: len=545890867990900 arcs=8130560 at 134217725
LOOP FOUND: len=545890867990900 arcs=8138879 at 134217726
LOOP FOUND: len=545890867990900 arcs=8135180 at 134217632
LOOP FOUND: len=272945433995450 arcs=4066985 at 134217666
LOOP FOUND: len=545890867990900 arcs=8133247 at 134217720
LOOP FOUND: len=545890867990900 arcs=8136918 at 134217648
LOOP FOUND: len=545890867990900 arcs=8133306 at 134217711
LOOP FOUND: len=272945433995450 arcs=4066387 at 134217721
LOOP FOUND: len=545890867990900 arcs=8134107 at 134217659
LOOP FOUND: len=545890867990900 arcs=8134882 at 134217719
LOOP FOUND: len=545890867990900 arcs=8132133 at 134217727
LOOP FOUND: len=545890867990900 arcs=8136446 at 134217695
LOOP FOUND: len=545890867990900 arcs=8134112 at 134217709
65 passes
789.18user 55.77system 6:08.18elapsed 229%CPU
```

There are 3 pairs of orbits of length 272945433995450 and 15 pairs of orbits of length 545890867990900.

And that's it. w27 is almost well behaved but there are 5 or so states that have not been reached, probably forming a very short pair of orbits... It's not recommended since w26 behaves better.

And this heavy run took only about 6 minutes. This is because I used a pair of SSD over USB3, one for reading and the other for writing, and vice versa. The bulk of the time was taken by **sort**, while the **fusion** program was clearly I/O bound. Maybe, later, I'll try with 3 SSD because **fusion** reads 2 streams...

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