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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 751st GrayJoKing 🇦🇺 860 56 416ms 15 Jan 2024 751st AlephSquirrel 860 56 704ms 21 Jan 2024 753rd Setvizan 860 62 10ms 12 Jan 2023 753rd GreenBeansAgainstVeganism 860 62 9ms 13 Jan 2023 753rd arctouch-cristiannevianna 860 62 10ms 3 Apr 2023 753rd Corxldyphik 860 62 9ms 11 Apr 2023 753rd Blockyheadman 860 62 9ms 1 Nov 2023 753rd ollyspooner 860 62 10ms 22 Nov 2023 753rd itserasmus 860 62 10ms 25 Jan 2024 753rd Jacob385 860 62 11ms 13 Mar 2024 753rd junkondo-jp 860 62 10ms 30 Jun 2024 753rd ShiraJoseph 🇺🇸 860 62 10ms 1 Mar 2025 763rd yzhs 🇩🇪 860 65 20ms 16 Jun 2022 763rd rollershutter 860 65 25ms 9 Sep 2022 763rd bac0id 860 65 19ms 26 Sep 2023 763rd robin-scragg 860 65 22ms 8 Jun 2025 763rd RaBa21 🇭🇺 860 65 39ms 11 Jul 2025 763rd TransformLikeATensor 860 65 20ms 17 Oct 2025 769th Andriamanitra 🇫🇮 860 67 159ms 26 Apr 2023 770th MeWhenI 🇻🇦 859 81 8ms 23 May 2023 771st MeWhenI 🇻🇦 859 145 441ms 28 Mar 2025 772nd ulucs 858 35 9ms 8 May 2022 772nd bstrat 858 35 8ms 6 Jun 2024 772nd wh3n3v3r 🇨🇿 858 35 9ms 18 Nov 2024 775th JRaspass 🇬🇧 858 41 354ms 4 May 2022 775th SirBogman 🇺🇸 858 41 241ms 4 May 2022 775th Natanaelel 🇸🇪 858 41 368ms 4 May 2022 778th 5quiwyrm 858 52 279ms 4 Sep 2022 778th MeWhenI 🇻🇦 858 52 261ms 28 Jan 2023 778th Feniske 🇫🇷 858 52 208ms 7 Nov 2023 778th dcgjb 858 52 251ms 29 Jan 2024 778th JPRuskin 🇬🇧 858 52 290ms 7 Apr 2025 778th IISResetMe 858 52 259ms 7 Apr 2025 778th Ripick 858 52 261ms 1 Jun 2025 785th Yewzir 🇧🇪 858 160 1,672ms 16 days ago 786th jared-hughes 857 72 3ms 6 Jul 2022 786th Steffan153 🇫🇮 857 72 3ms 3 Jan 2023 786th MeWhenI 🇻🇦 857 72 2ms 7 May 2023 786th ListeriaM 857 72 2ms 22 Aug 2023 786th larcherMTT 857 72 3ms 5 Oct 2024 786th snyderek 🇺🇸 857 72 3ms 19 Feb 2025 786th 5quiwyrm 857 72 3ms 29 Jun 2025 786th TeodorDyakov 🇧🇬 857 72 2ms 8 Jul 2025 786th xiaoyiming123 857 72 2ms 12 Jul 2025 795th ovs-code 🇩🇪 856 83 63ms 1 Jul 2024 796th Liibe 856 97 334ms 25 Sep 2025 796th Schmitt-Very-Cool 856 97 336ms 26 Sep 2025 798th frankgraziano 856 198 101ms 14 Oct 2025 799th Frowny 855 38 43ms 5 May 2022 799th stackofbears 855 38 53ms 14 Mar 2025 801st typeswitch-dev 🇵🇹 855 75 5ms 22 Jul 2023 802nd 386asm 🇺🇸 855 86 45ms 9 Apr 2023 803rd DialFrost 🇸🇬 854 50 254ms 24 Oct 2023 804th MeWhenI 🇻🇦 854 71 96ms 13 Dec 2022 805th henrydukepickle 854 97 128ms 8 Jul 2025 806th yeminghan2021 854 99 54ms 3 Feb 2025 807th aditsu 853 77 2,042ms 7 days ago 808th eshilo-draper 853 91 317ms 4 Sep 2022 808th ericlangedijk 🇸🇮 853 91 330ms 23 May 2023 808th KatieLG 🇬🇧 853 91 333ms 30 Apr 2024 808th Mikey-Beep 🇬🇧 853 91 316ms 3 Sep 2024 812th ovs-code 🇩🇪 853 161 1,597ms 14 Sep 2025 813th frosster 852 76 7ms 12 May 2023 813th kyleclaassen 852 76 11ms 20 May 2023 813th NickTheEASDude 🇺🇸 852 76 6ms 7 May 2024 813th koipondx86 852 76 8ms 8 Nov 2024 817th Shanethegamer 🇺🇸 852 83 1,291ms 4 May 2022 818th MeWhenI 🇻🇦 852 92 398ms 10 Oct 2022 818th Betuaredead 852 92 468ms 5 Jan 2023 818th emgordon154 852 92 427ms 27 May 2025 818th Yax42 🇫🇷 852 92 420ms 4 Oct 2025 822nd o0lit3 🇺🇸 851 54 8ms 22 Jun 2023 822nd Natanaelel 🇸🇪 851 54 8ms 10 Feb 2025 824th Shanethegamer 🇺🇸 851 58 790ms 17 Sep 2025 825th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 First Prev 751–825 of 3,469 Next Last