UNSOLVED PROBLEMS

In Number Theory, Logic, and Cryptography

Contributions and Proposed Solutions

This page provides a means for authors to have their papers made available for open inspection and feedback.  All contributions are as supplied by the author, and are not peer-reviewed.

Constructive feedback is encouraged, and should be sent direct to the relevant author, or posted to the companion discussion group, https://groups.io/g/UnsolvedProblems/topics,where questions can be asked and any of the problems or potential solutions discussed.

If you wish to have a contribution published here, please read the FAQ, and then contact me.

 

#176: A contribution to the Goldbach Conjecture. Submitted by Kim Holleson , 21.30 GMT, Sunday 24th August 2025.

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#175: A contribution to the Legendre Conjecture. Submitted by Kim Holleson , 00.30 GMT, Thursday 14th August 2025.

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#174: A contribution to Brocard's Problem. Submitted by John Lucas , 10.30 GMT, Saturday 5th June 2025.

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#173: A contribution to Fermat's Last Theorem. Submitted by Sylvain Bernier , 9.30 GMT, Friday 25th April 2025.

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#172: A contribution to the Goldbach Conjecture. Submitted by Junho Eom , 2.30 GMT, Tuesday 30th July 2024.

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#171: A contribution to the Goldbach Conjecture. Submitted by Ipolo Yves Desire , 19.30 GMT, Sunday 28th July 2024.

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#170: A contribution to Fermat's Conjecture. Submitted by Olivier Massot , 15.00 GMT, Sunday 14th July 2024.

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#169: A contribution to quantum gravitational electro-magnetism. Submitted by Peter Rodgers, 13.00 GMT, Thursday 30th May 2024.

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#168: A contribution to the Riemann Hypothesis. Submitted by Ricardo Gil, 14.00 GMT, Tuesday 28th May 2024.

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#167: A contribution to the Twin Prime Conjecture. Submitted by Patrick diCarlo, 14.00 GMT, Saturday 27th January 2024.

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#166: A contribution to the Twin Prime Conjecture. Submitted by Kim Holleson, 18.00 GMT, Monday 8th January 2024.

Removed at the request of the author.

#165: A contribution to the Riemann Hypothesis. Submitted by Nicholas Wright, 14.00 GMT, Saturday 28th October 2023.

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#164: A contribution to the Fermat's Last Theorem. Submitted by Stefano Maruelli, 9.00 GMT, Wednesday 7th June 2023.

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#163: A contribution to Legendre's Conjecture. Submitted by Wing K Yu , 23.00 GMT, Friday 14th April 2023.

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#162: A contribution to the Riemann Hypothesis. Submitted by Tai Nakashima, 04.00 GMT, Monday 26th December 2022.

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#161: A contribution to the Prime Gaps problem . Submitted by OOOVincentOOO , 18.00 GMT, Friday 10th June 2022.

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#160: A contribution to the Collatz Conjecture. Submitted by Michael Williams , 21.00 GMT, Thursday 7th April 2022.

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#158: A contribution to the Twin Primes Conjecture. Submitted by Antoni Cuenca, 6.00 GMT, Sunday 6th March 2022.

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#157: A contribution to the Perfect Cuboid Problem. Submitted by Natalia V. Aleshkevich, 18.00 GMT, Saturday 5th March 2022.

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#156: A contribution to the N-Queens Problem. Submitted by Alessandro Boatto, 15.00 GMT, Tuesday 22nd February 2022.

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#154: A contribution to the Collatz Conjecture. Submitted by Gaurav Krishna, 14.30 GMT Monday 18th October 2021.

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#153: A contribution to the Odd Perfect Number problem. Submitted by Enrique Santos, 20.30 GMT, Friday 6th July 2018, revised 19:30 GMT, Thursday 12th July 2018, resubmitted 12.00 GMT Monday 18th October 2021.

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#152: A contribution to the Collatz Conjecture. Submitted by Adarsha Chandra, 6.30 GMT, Friday 24th September 2021, revised version submitted 7.15 GMT, Saturday 9th October 2021

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#151: A contribution to the Lonely Runner Conjecture. Submitted by Babacar Gueye, 22.00 GMT, Monday 6th September 2021.

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#150: A contribution to Brocard's Problem. Submitted by Babacar Gueye, 11.30 GMT, Wednesday 1st September 2021.

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#126: The solution to the Dorabella Cipher. Submitted by Tim Roberts, 22.45 GMT, Thursday 1st August 2019.

This is a slightly amended version of a paper previously publsihed in 2014. Click here for full text.

An archive of some older articles can be found here.

 

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Tim S Roberts

Email: timro21@gmail.com