I designed a silly but semi-functional computer.

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Get your calculating christmas card! Support me on patreon: https://www.patreon.com/standupmaths All Patreon supporters will be emailed a personalised card (deadline end of December, but sign up sooner for an earlier email) and "statistically significant" or higher get posted a physical signed card (deadline end of December but sign up by end of November to get it before christmas). Check out Mark Dominus's great blog. Link to follow-on post at end of this one. https://blog.plover.com/math/irish-logarithm.html Here is the sign-up to volunteer for Pi By Hand 2024. https://forms.gle/CVocrwomCe1Q4iuX6 Paper on other method to get Ludgates's values: https://treasures.scss.tcd.ie/miscellany/TCD-SCSS-X.20121208.002/Ludgate-LogarithmixIndexes-20200610-1459.pdf All of the numbers I found are below. So many numbers. Presented three different ways, which is really unhelpful. Huge thanks to my Patreon supporters. They put the teeth on my cogs. https://www.patreon.com/standupmaths CORRECTIONS - Yes, the invention of logs in 1614 is 410 years ago, not 400, as I said around 06:10. On the fly my brain confused it with the 1624 publishing of Arithmetica Logarithmica, the first great log table book. First noted by AlexSh789. - In the completed table around 11:54 I accidentally put in some products where are not the result of two one-digit numbers (60, 80 and 90), and thus are not needed. First pointed out by Frederico via email. - Let me know if you spot anything else! Filming and editing by Alex Genn-Bash Written and performed by Matt Parker Produced by Nicole Jacobus Cogputer build by Lisa Mather and Katie Steckles Tree build by Nina, Carrie and assisted by Laura. Extra material by Adam Atkinson Music by Howard Carter Design by Simon Wright and Adam Robinson MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ US book: https://www.penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker/ UK book: https://mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback 0-9 COGPUTER 0 cog: 1 teeth 1 cog: 42 teeth 2 cog: 41 teeth 3 cog: 27 teeth 4 cog: 40 teeth 5 cog: 8 teeth 6 cog: 26 teeth 7 cog: 18 teeth 8 cog: 39 teeth 9 cog: 12 teeth LABELS ON MIDDLE COG: CE, --, 00, --, --, --, --, --, --, 00, --, --, --, 00, --, --, 25, --, --, 00, 45, --, --, --, 81, --, 35, 00, 00, --, 63, --, --, --, 30, 15, 49, --, 54, 27, 00, 00, 00, 00, 42, 21, --, 40, 20, 10, 05, 72, 36, 18, 09, --, --, 56, 28, 14, 07, --, --, --, --, 48, 24, 12, 06, 03, --, --, --, --, --, --, --, --, 64, 32, 16, 08, 04, 02, 01 1-9 CHRISTMAS TREE Present 1 is 7 units tall Present 2 is 5 units tall Present 3 is 18 units tall Present 4 is 3 units tall Present 5 is 21 units tall Present 6 is 16 units tall Present 7 is 28 units tall Present 8 is 1 units tall Present 9 is 29 units tall Bauble 1 is 14 units high Bauble 2 is 12 units high Bauble 3 is 25 units high Bauble 4 is 10 units high Bauble 5 is 28 units high Bauble 6 is 23 units high Bauble 7 is 35 units high Bauble 8 is 8 units high Bauble 9 is 36 units high Bauble 10 is 26 units high Bauble 12 is 21 units high Bauble 14 is 33 units high Bauble 15 is 39 units high Bauble 16 is 6 units high Bauble 18 is 34 units high Bauble 20 is 24 units high Bauble 21 is 46 units high Bauble 24 is 19 units high Bauble 25 is 42 units high Bauble 27 is 47 units high Bauble 28 is 31 units high Bauble 30 is 37 units high Bauble 32 is 4 units high Bauble 35 is 49 units high Bauble 36 is 32 units high Bauble 40 is 22 units high Bauble 42 is 44 units high Bauble 45 is 50 units high Bauble 48 is 17 units high Bauble 49 is 56 units high Bauble 54 is 45 units high Bauble 56 is 29 units high Bauble 63 is 57 units high Bauble 64 is 2 units high Bauble 72 is 30 units high Bauble 81 is 58 units high 2-9 CHRISTMAS TREE CARD 2: 3 3: 12 4: 2 5: 17 6: 11 7: 24 8: 1 9: 20 height: bauble number 2: 64 3: 32 4: 16 5: 8 6: 4 12: 48 13: 24 14: 12 15: 6 18: 40 19: 20 20: 10 21: 72 22: 36 23: 18 24: 9 25: 56 26: 28 27: 14 28: 30 29: 15 31: 54 32: 27 34: 25 35: 42 36: 21 37: 45 40: 81 41: 35 44: 63 48: 49 THE END PS https://forms.gle/UqZQRwYe26SLJjMn8