Mathematics
Previous Challenges
The Cipher Challenges for Kryptos 12: 2022
Challenge 1 [solution] Challenge 2 [solution] Challenge 3 [solution]
A summary of the 2022 results is available
The Cipher Challenges for Kryptos 11: 2021
Challenge 1 [solution] Challenge 2 [solution] Challenge 3 [solution]
A summary of the 2021 results is available.
The Cipher Challenges for Kryptos 10: 2020
Challenge 1 [solution] Challege 2 [solution] Challenge 3 [solution]
A summary of the 2020 results is available.
The Cipher Challenges for Kryptos 9: 2019
Challenge 1 [solution] Challenge 2 [solution] Challenge 3 [solution]
A summary of the 2019 results is available.
The Cipher Challenges for Kryptos 8: 2018
Challenge 1 [solution] Challenge 2 [solution] Challenge 3 [solution]
A summary of the 2018 results is available.
The Cipher Challenges for Kryptos 7: 2017
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (solution)
A summary of the 2017 results is available.
The Cipher Challenges for Kryptos 6: 2016
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (solution)
A summary of the 2016 results is available.
The Cipher Challenges for Kryptos 5: 2015
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (solution)
A summary of the 2015 results is available.
The Cipher Challenges for Kryptos 4: 2014:
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (solution)
A summary of the 2014 results is available.
The Cipher Challenges for Kryptos3: 2013:
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (hint) (solution)
A summary of the 2013 results is available.
The Cipher Challenges for Kryptos 2: 2012:
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (solution)
A summary of the 2012 results is available.
The Cipher Challenges for Kryptos 1: 2011:
Challenge 1 (solution) Challenge 2 (solution) Challenge 3 (solution)
A summary of the 2011 results is available.
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