In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned." Ban numbers are not precisely defined, since some large numbers do not follow the standards of number names (such as googol and googolplex). There are several published sequences of ban numbers: * The aban numbers do not contain the letter A. The first few aban numbers are 1 through 999, 1,000,000 through 1,000,999, 2,000,000 through 2,000,999, ... The word "and" is not counted. * The eban numbers do not contain the letter E. The first few eban numbers are 2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, 50, 52, 54, 56, 60, 62, 64, 66, 2000, 2002, 2004, ... (sequence in the OEIS). The sequence was coined in 1990 by Neil Sloane. Coincidentally, all the numbers in the sequence are even. * The iban numbers do not contain the letter I. The first few iban numbers are 1, 2, 3, 4, 7, 10, 11, 12, 14, 17, 20, 21, 22, 23, 24, 27, 40, ... (sequence in the OEIS). Since all -illion numbers contain the letter I, there are exactly 30,275 iban numbers, the largest being 777,777. * The oban numbers do not contain the letter O. The first few oban numbers are 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 23, 25, 26, ... (sequence in the OEIS). Since "thousand" and all the -illion numbers contain the letter O, there are exactly 454 oban numbers, the largest being 999. * The tban numbers do not contain the letter T. The first few tban numbers are 1, 4, 5, 6, 7, 9, 11, 100, 101, 104, 105, 106, 107, 109, 111, 400, 401, 404, 405, 406, ... (sequence in the OEIS). * The uban numbers do not contain the letter U. The first few uban numbers are 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, ... (sequence in the OEIS). (Wikipedia).
Problems with French Numbers - Numberphile
French numbers can pose problems for non-native speaker - especially when you move beyond 70. Also discussing problems with phone numbers and commas! More links & stuff in full description below ↓↓↓ Featuring Dr Paul Smith from the University of Nottingham. The French and marks out of 20
From playlist Numberphile Videos
This WON'T Fool you... UNLESS you're a Magician!
*** HIT THE NOTIFICATION BUTTON SO YOU’LL NEVER MISS A VIDEO*** MAKE SURE YOU SUBSCRIBE AND LEAVE A COMMENT IF YOU WANT TO SEE MORE VIDEOS SUBSCRIBE HERE: https://www.youtube.com/CHRISRAMSAY52 Some light-hearted fun for the magicians out there. ;)
From playlist Magician Problems.
Gaps between Primes (extra footage) - Numberphile
More links & stuff in full description below ↓↓↓ Main video at: http://youtu.be/vkMXdShDdtY Brown papers available: http://bit.ly/brownpapers Prime number playlist: http://bit.ly/11kSUmF Featuring Ed Copeland and Tony Padilla (with a very non-expert intro by Brady). NUMBERPHILE Website:
From playlist Numberphile Videos
Brown papers auction: http://bit.ly/brownpapers Mona Lisa in binary: http://bit.ly/15D4T7M More links & stuff in full description below ↓↓↓ This video features Dr James Grime - https://twitter.com/jamesgrime The hex should be: 4E554D, etc... We missed a digit copying it out! NUMBERPHILE
From playlist James Grime on Numberphile
A different way at trying to quit smoking!
From playlist Funny Videos, Parodies, Odds and ends!
5040 and other Anti-Prime Numbers - Numberphile
Audible: http://www.audible.com/numberphile (free trial) Dr James Grime discusses highly composite numbers. More links & stuff in full description below ↓↓↓ Continues and extra footage: https://youtu.be/PF2GtiApF3E Prime numbers (more videos): http://bit.ly/primevids http://www.antiprim
From playlist Prime Numbers on Numberphile
0045 - Custom C++ Web Server: temporary IP address blacklisting
This is #45 in my series of live (Twitch) coding streams, working on writing my own web server and service framework in C++. This stream I fixed a couple deadlock issues in the server, and implemented a ban/blacklist system to ignore clients that send bad requests or spam the server with
From playlist Excalibur
Gun Law Research and the Assault Weapon Ban - Stanford Legal on Sirius XM
Pam and Joe welcome John Donohue, Stanford Law Professor, who talks about his new research looking at concealed carry gun laws and the Assault Weapons Ban. Originally aired on November 22, 2019
From playlist Stanford Legal podcast
SSH Brute Force Protection With Fail2Ban
Hey guys! in this video I will be showing you how to setup SSH brute-force protection with Fail2Ban on Linux. Fail2ban scans log files (e.g. /var/log/apache/error_log) and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. Generally, Fail2Ban i
From playlist Linux
Solving A Sudoku Using a LETTERS Trick
*** TODAY'S SUDOKU *** Simon is still on his laptop today but cheers himself up by attempting the new Phistomefel puzzle! It's a non-consecutive renban sudoku and, as always, incredible. And Simon uses the new letters feature of our online software to crack the puzzle!! Play the puzzle
From playlist Phistomefel Puzzles
How To Get A Distinction In Sudoku
*** TODAY'S PUZZLE *** WHAT a clever sudoku we've got today in the form of Distinction, the new puzzle by zetamath. It's a slight twist on a popular ruleset and it sprinkles a little magic into the logic. Play the puzzle at the link below: https://app.crackingthecryptic.com/sudoku/mMPF
From playlist zetamath puzzles!
Sliced Bread and the Second World War
Sliced bread is the standard for greatness. No one seems to ask what was the greatest thing before sliced bread, and many compete over what is the greatest thing since. But, in 1943, sliced bread was about to encounter the largest war in human history, leading many to argue that the worst
From playlist US History
163 and Ramanujan Constant - Numberphile
Why does Alex Clark, from the University of Leicester, have a strange fascination with 163? More links & stuff in full description below ↓↓↓ Some slightly more advanced stuff in this video, including the Ramanujan Constant and its use in a "famous" April Fool's joke. NUMBERPHILE Website:
From playlist Prime Numbers on Numberphile
Incredibly, there was a 6th landing beach on D-Day, but its name and purpose has been forgotten for 70 years...until now! Dr. Mark Felton is a well-known British historian, the author of 22 non-fiction books, including bestsellers 'Zero Night' and 'Castle of the Eagles', both currently be
From playlist Battle of Normandy 1944
0131 [ C++ ] Admin player controls, moderation queue
This is #131 in my series of live (Twitch) coding streams. This stream I improved the Orchestrator's diagnostic log, sorting messages by timestamp. I also started enhancing player records in preparation for adding administrator and moderator tools for governing players in the game. No
From playlist Excalibur
Can the President Ban TikTok? | LegalEagle’s Real Law Review
⭐️ Get my videos early & ad free (plus my exclusives!) only on Nebula. Save $10 per year! https://legaleagle.link/getnebula ⭐️ What’s going to happen to TikTok? Can President Trump ban it? WHAT ABOUT THE MEMES??? Get CuriosityStream AND Nebula for less than $15 (26% off!) https://curiosi
From playlist Law Review News!
Which Children's Classics Have Been Banned? | Banned Books, Burned Books: Forbidden Literary Work
Winnie the Pooh, Alice in Wonderland, and the books of Dr. Seuss have all been at least contested by school boards and many of them have been banned outright. The lumber industry tried to axe The Lorax, prudish parents fretted over Pooh's lack of pants, and Alice seemed addled with halluci
From playlist Psychology and Communication
4937775 is a Smith Number - as are 27, 666 and infinite others! More links & stuff in full description below ↓↓↓ Smith Numbers were first discovered in a phone book, explains Professor Ed Copeland from the University of Nottingham. Ed Tweets: https://twitter.com/ProfEdCopeland NUMBERPHIL
From playlist Numberphile Videos