Largest power of 2 which doesn't contain 0?

What is the largest power of 22 which doesn't contain 00?

I tried a variety of methods to tackle this problem including programming and I even got the answer as 8686 but I couldn't prove that there exists no larger power of 22 which doesn't contain 00.


Note: I tried brute forcing for integers up to 2100000{2}^{100000} but with no luck. So for 2n{2}^{n}, the nn must be greater than 100000100000. Inspiration (Calvin Lin's comment).
#Algebra #Combinatorics #NumberTheory #Exponents #ComputerScience

Note by Arulx Z
5 years, 11 months ago

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Comments

If you've tried up to 2100000,2^{100000}, which has in excess of 3000030000 digits, then the probability that any given power of two greater than this not including a 00 would be less than 101378.10^{-1378}. While this is not a proof, it seems pretty certain that no greater power than 21000002^{100000} will be devoid of a 0.0. So perhaps 8686 is indeed the solution that you are looking for.

Edit: This is in fact the conjectured greatest power with this property, but a proof remains an open problem.

Brian Charlesworth - 5 years, 11 months ago

Relevant.

Pi Han Goh - 5 years, 7 months ago

99999999999999999999998

Rushikesh Jyoti - 5 years, 10 months ago

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Prove it.

Arulx Z - 5 years, 9 months ago
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