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Collatz in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 451st Shanethegamer 🇺🇸 899 72 4ms 4 May 2022 451st jared-hughes 899 72 4ms 4 May 2022 451st Waffle3z 899 72 7ms 5 May 2022 451st Blendi-Goose 899 72 6ms 16 Mar 2025 451st edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 451st sean-niemann 🇺🇸 899 72 6ms 16 Oct 2025 457th michael-pruglo 🇺🇦 899 94 52ms 5 Jul 2022 457th zygoloid 899 94 51ms 5 Aug 2024 459th shinh 898 52 42ms 29 Jun 2022 459th MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 461st Lydxn 🇨🇦 898 70 88ms 7 May 2022 462nd MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 463rd m-tkach 🇺🇦 898 72 104ms 16 Oct 2022 463rd GrayJoKing 🇦🇺 898 72 114ms 22 Oct 2022 463rd emplv 🇱🇻 898 72 105ms 27 Oct 2022 463rd sean-niemann 🇺🇸 898 72 124ms 7 Mar 2025 467th Steffan153 🇫🇮 897 82 44ms 1 Apr 2023 467th sean-niemann 🇺🇸 897 82 43ms 12 Jul 2024 469th sean-niemann 🇺🇸 897 108 261ms 25 May 2024 469th GolfingSuccess 🇬🇷 897 108 252ms 6 Sep 2025 471st Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 471st GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 471st btnlq 895 69 7ms 24 Sep 2022 474th trinityy-7 894 69 2ms 7 Aug 2025 475th SirBogman 🇺🇸 892 50 407ms 5 May 2022 475th nwellnhof 🇩🇪 892 50 402ms 3 Jun 2022 475th Lydxn 🇨🇦 892 50 413ms 15 Aug 2022 475th Steffan153 🇫🇮 892 50 390ms 9 Aug 2024 479th edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 479th kg583 🇺🇸 892 78 11ms 25 Sep 2025 481st MichalMarsalek 🇨🇿 892 87 324ms 5 May 2022 481st Kloppermand 🇩🇰 892 87 326ms 7 Oct 2022 481st bwat2 892 87 317ms 6 Apr 2023 484th GrayJoKing 🇦🇺 892 91 31ms 19 Jan 2023 485th Lydxn 🇨🇦 891 72 302ms 16 Jul 2023 486th oeb25 891 93 128ms 16 May 2022 486th snobee 🇨🇦 891 93 130ms 8 Dec 2022 486th logvp 891 93 123ms 2 Jan 2024 486th elgan65536 891 93 124ms 5 Mar 2024 486th smartiel 891 93 120ms 12 Aug 2024 486th trist224 🇫🇷 891 93 126ms 12 Aug 2024 486th nullie 891 93 126ms 19 Dec 2024 486th lolgeny 891 93 126ms 22 Feb 2025 494th p-zubieta 890 48 259ms 6 Mar 2024 495th Ripick 890 73 121ms 8 May 2023 496th Steffan153 🇫🇮 890 80 24ms 11 Dec 2023 497th GolfingSuccess 🇬🇷 890 95 52ms 5 May 2022 497th Alex-x90 🇺🇸 890 95 53ms 4 Dec 2022 497th Mandrzejy 🇵🇱 890 95 53ms 22 Mar 2024 500th Steffan153 🇫🇮 889 80 40ms 15 Nov 2022 500th error256 889 80 130ms 8 Apr 2025 502nd MeWhenI 🇻🇦 889 109 255ms 9 Feb 2023 503rd KatieLG 🇬🇧 888 60 10ms 4 May 2022 503rd ScottHamper 888 60 10ms 5 May 2022 503rd Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 503rd 0x24a537r9 888 60 10ms 29 Jul 2022 503rd stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 503rd eranws 888 60 10ms 10 Sep 2022 503rd GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 503rd BloodStormKnight 888 60 10ms 15 Oct 2022 503rd dzshn 888 60 9ms 3 Dec 2022 503rd biocommando 🇫🇮 888 60 10ms 20 Dec 2022 503rd Betuaredead 888 60 9ms 5 Jan 2023 503rd piano-miles 888 60 10ms 16 Jan 2023 503rd Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 503rd shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 503rd zakariamouhid 888 60 9ms 20 May 2023 503rd raphaelimahorn 888 60 10ms 23 Aug 2023 503rd jbt 888 60 11ms 25 Dec 2023 503rd olleicua 🇺🇸 888 60 10ms 15 Feb 2024 503rd HumanoidCPU 888 60 10ms 3 May 2024 503rd dokutan 888 60 9ms 13 Aug 2024 503rd LostSyntax21 🇬🇧 888 60 10ms 10 Sep 2024 503rd xyangst 888 60 10ms 28 Sep 2024 503rd a6166231 🇨🇳 888 60 9ms 15 May 2025 First Prev 451–525 of 3,469 Next Last