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Forum: Miscellaneous Math 2022-05-21, 13:58
Replies: 8
Views: 1,140
Posted By Dr Sardonicus
No. The number of k-digit blocks of decimal...

No. The number of k-digit blocks of decimal digits is 10^k. The number of k-digit endings of 2^n, n ≥ k, is 4*5^(k-1). (4*5^(k-1))/10^k is a tiny, tiny fraction if k is at all large. For k = 40,...
Forum: Miscellaneous Math 2022-05-18, 02:31
Replies: 8
Views: 1,140
Posted By Dr Sardonicus
It occurred to me to wonder whether there is a k...

It occurred to me to wonder whether there is a k for which all k-digit endings of 2^n (with k > 9 and 2^n > 10^(k-1) of course) contain all 10 decimal digits.

I suspect there is, but don't have a...
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