What is the largest power of 2 which doesn't contain 0?
I tried a variety of methods to tackle this problem including programming and I even got the answer as 86 but I couldn't prove that there exists no larger power of 2 which doesn't contain 0.
Note: I tried brute forcing for integers up to 2100000 but with no luck. So for 2n, the n must be greater than 100000. Inspiration (Calvin Lin's comment).
#Algebra
#Combinatorics
#NumberTheory
#Exponents
#ComputerScience
Easy Math Editor
This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.
When posting on Brilliant:
*italics*
or_italics_
**bold**
or__bold__
paragraph 1
paragraph 2
[example link](https://brilliant.org)
> This is a quote
\(
...\)
or\[
...\]
to ensure proper formatting.2 \times 3
2^{34}
a_{i-1}
\frac{2}{3}
\sqrt{2}
\sum_{i=1}^3
\sin \theta
\boxed{123}
Comments
If you've tried up to 2100000, which has in excess of 30000 digits, then the probability that any given power of two greater than this not including a 0 would be less than 10−1378. While this is not a proof, it seems pretty certain that no greater power than 2100000 will be devoid of a 0. So perhaps 86 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.
Relevant.
99999999999999999999998
Log in to reply
Prove it.