5 to the 2000th power is an extremely large number, as it involves multiplying 5 by itself 2000 times. The result is a 1 followed by 2000 zeros, or in scientific notation, 5 x 10^2000. This number is far beyond the capability of most calculators to compute due to its immense size.
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It is 5 x 5 x 5 x ... two thousand times.
Most normal programs cannot deal with numbers this large, but the answer is
8.70981 * 101397 (to 6 sig fig)
The nth triangular number is n(n+1)/2, so the 2000th triangular number is 2000 * 2001 / 2 = 2,001,000
258
5 to the power of 2
59 / 56 = 59-6 = 53 That is not written as a power of 5 i.e. (x5) You have to rewrite 53 to x5 = 2.6265278...5
5 to the 3 power is 5 cubed written as 53