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The first digit of 2^n

Submitted by Steven Fuqua, March 18 1997, and originally answered by Valerio De Angelis.

The sequence of powers of two produces the sequence of first digits of powers of two (base ten). So, , , , , and so on. Does the number seven ever occur in the sequence ? Which occurs most frequently, seven or eight? Determine explicitly the probability that 1 occurs as a first digit and repeat for each of 2, 3, 4, ..., 9.

[Technically, the probability that the number five, for instance, occurs in is the limit ].

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