How Far Can You TNT/Fireball Jump?

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On Gamster I can fireball and TNT jump 22 blocks.
On Hypixel only 16.

Both of these have practice modes so it is easier to test than in game.

How far can you TNT and fireball jump here?
How much further can you get with a double TNT jump?

 

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There is a foreign language server called Hylex which has 32 blocks for fireball jumps!

Which map have you managed to jump base to base or diamond gen to base with the fewest blocks?