I try to finish tasks that I once started and had to interrupt as one has to do work also. One of the longer ones was solving well-known mathematical problems. I have tried quite many of them, not only the seven Clay Math millennium prize problems, but a lot of hard problems for which nobody offers any money. For this is done for fun. I put five of the solutions into a book. These are all checked, though I am still checking and editing the last paper, of P not NP. The proof is correct, but the presentation can still be improved before submitting. The solutions to the Riemann Hypothesis and the Hodge Conjecture are currently in review. I am about ready to submit the Birch and Swinnerton-Dyer solution, but not this week yet. One has to read papers very carefully before sending to journals. Here you have the book. I expect that nobody will read the papers, but there is a short foreword.
https://www.researchgate.net/publication/344886458_Solutions_to_CMI_millennium_prize_problems