---+-----+-----
 1 | 1   | 15
---+-----+-----
 2 | 16  | 25
---+-----+-----
 3 | 26  | 50
---+-----+-----
 4 | 51  | 84
---+-----+-----
 5 | 85  | 99
---+-----+-----

Prime Identity

99 - 15 - 15 = 69 = 9 + 60 = 9 + (100 - 40)

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                                |                              ----------- 5 -----------
                                |                             |                         |  
                                ↓                             ↑                         ↓
 |   mapping    |     feeding     |  lexering    |  parsering   |   syntaxing   |  grammaring  |
 |------------- 36' --------------|----------------------------36' ----------------------------|
 |     19'      |        17'      |      13'     |      11'     |       7'      |       5'     |
 +----+----+----+---+----+----+---+---+----+-----+----+----+----+----+----+-----+----+----+----+
 |  1 |  2 |  3 | 4 |  5 |  6 | 7 | 8 |  9 |  10 | 11 | 12 | 13 | 14 | 15 |  16 | 17 | 18 | 19 |
 +----+----+----+---+----+----+---+---+----+-----+----+----+----+----+----+-----+----+----+----+
 |  2 | 60 | 40 | 1 | 30 | 30 | 5 | 1 | 30 | 200 |  8 | 40 | 50 |  1 | 30 | 200 |  8 | 10 | 40 |
 +----+----+----+---+----+----+---+---+----+-----+----+----+----+----+----+-----+----+----+----+
                                ↓                             ↑                         |    |
                                |                             |                         |    |
                                 ------------ 10 -------------                          |    |
                                                                                        ↓    ↓ |
                                                                                +----+----+----+---+----+----+---+
                                                                                |  2 | 60 | 40 | 1 | 30 | 30 | 5 |
                                                                                        |    | |
                                                                                     2+100 ◄- 
   -----------------------+----+----+----+----+----+----+----+----+----+-----           |
   True Prime Pairs Δ    |  1 |  2 |  3 |  4 |  5 |  6 |  7 |  8 |  9 | Sum             |
  =======================+====+====+====+====+====+====+====+====+====+=====            ↓
   19 → π(10)            |  2 |  3 |  5 |  7 |  - |  - |  - |  - |  - | 4th  ◄- 4 =  π(10)
  -----------------------+----+----+----+----+----+----+----+----+----+-----

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Experiment and computer simulations suggest the existence of a "mass gap" in the solution to the quantum versions of the Yang-Mills equations. But no proof of this property is known (Clay Institute).

Yang–Mills and Mass Gap