$True Prime Pairs:
(5,7), (11,13), (17,19)
layer| i | f
-----+-----+---------
| 1 | 5
1 +-----+
| 2 | 7
-----+-----+--- } 36 » 6®
| 3 | 11
2 +-----+
| 4 | 13
-----+-----+---------
| 5 | 17
3 +-----+ } 36 » 6®
| 6 | 19
-----+-----+---------
| |-----+-----+-----+ |
| 4 | | 11 |15,18| 29,30,31,32 ←---4x---- ←--- 35,34,33 are missing?
| | 6 +-----+-----+
| | | 12 | 19 | 36 --------------------------------------
------+------+-----+-----+-----+------- |
| | | 13 | 20 | {38} |
| | 7 +-----+-----+ |
| 5 | | 14 |21,22| {40,41} = (19-17)x ---- |
| |-----+-----+-----+ | |
| | | 15 | 23 | {42} 6x + 13x = 19x |
3 +------+ 8 +-----+-----+ | |
| | | 16 |24,27| {43,44,45,46} ←- 4x -- |
| |-----+-----+-----+ |
| 6 | | 17 | 28 | {50} = 46 + 4 |
| | 9 +-----+-----+ |
| | | 18 | 29 | {68} = 32 + 36 ←- they meet here ---------
------|------|-----+-----+------