Answer :

there are 26 digits in 3^53
lipi
3=2+1
[2+1]^52*3
[[2+1]^2]^26*3
[[9]^2]^13*3
[81]^13*3
81*3*[[81]^2]^6
81*3*[6561]^6
243* [[6561]^2]^3
243*43046721*43046721*43046721
so it will have 26 term

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