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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 798th robin-scragg 860 65 23ms 8 Jun 2025 798th RaBa21 🇭🇺 860 65 26ms 11 Jul 2025 798th TransformLikeATensor 860 65 21ms 17 Oct 2025 804th Andriamanitra 🇫🇮 860 67 144ms 26 Apr 2023 805th MeWhenI 🇻🇦 860 81 8ms 23 May 2023 806th ulucs 859 35 9ms 8 May 2022 806th bstrat 859 35 9ms 6 Jun 2024 806th wh3n3v3r 🇨🇿 859 35 8ms 18 Nov 2024 809th JRaspass 🇬🇧 859 41 409ms 4 May 2022 809th SirBogman 🇺🇸 859 41 274ms 4 May 2022 809th Natanaelel 🇸🇪 859 41 384ms 4 May 2022 812th 5quiwyrm 859 52 264ms 4 Sep 2022 812th MeWhenI 🇻🇦 859 52 333ms 28 Jan 2023 812th Feniske 🇫🇷 859 52 254ms 7 Nov 2023 812th dcgjb 859 52 356ms 29 Jan 2024 812th JPRuskin 🇬🇧 859 52 263ms 7 Apr 2025 812th IISResetMe 859 52 232ms 7 Apr 2025 812th Ripick 859 52 237ms 1 Jun 2025 812th madex 🇩🇪 859 52 271ms 16 Mar 2026 820th typeswitch-dev 🇵🇹 859 75 4ms 22 Jul 2023 821st dokutan 859 79 10ms 27 Apr 2024 821st SwordF-Official 🇺🇸 859 79 10ms 1 Feb 2026 823rd Shanethegamer 🇺🇸 859 81 17ms 19 Dec 2023 823rd emgordon154 859 81 20ms 29 Jul 2025 825th emgordon154 859 159 1,737ms 24 Dec 2025 825th DialFrost 🇸🇬 859 159 1,683ms 17 Jan 2026 827th frankgraziano 859 198 108ms 14 Oct 2025 828th jared-hughes 858 72 2ms 6 Jul 2022 828th Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 828th MeWhenI 🇻🇦 858 72 2ms 7 May 2023 828th ListeriaM 858 72 2ms 22 Aug 2023 828th larcherMTT 858 72 2ms 5 Oct 2024 828th snyderek 🇺🇸 858 72 2ms 19 Feb 2025 828th 5quiwyrm 858 72 2ms 29 Jun 2025 828th TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 828th xiaoyiming123 858 72 2ms 12 Jul 2025 837th ovs-code 🇩🇪 858 83 57ms 1 Jul 2024 838th 386asm 🇺🇸 858 86 40ms 9 Apr 2023 838th DialFrost 🇸🇬 858 86 43ms 30 Dec 2025 840th Liibe 857 97 471ms 25 Sep 2025 840th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 842nd nwellnhof 🇩🇪 857 111 308ms 4 May 2022 842nd stefangimmillaro 857 111 341ms 26 Sep 2023 842nd kkoenig 857 111 319ms 4 Jan 2024 845th Frowny 856 38 40ms 5 May 2022 845th stackofbears 856 38 42ms 14 Mar 2025 847th Shanethegamer 🇺🇸 856 70 104ms 12 Dec 2022 847th Alessandro-Balconi 🇮🇹 856 70 102ms 26 Dec 2022 847th snoozingnewt 🇨🇦 856 70 210ms 22 Nov 2025 850th aditsu 856 77 2,321ms 23 Nov 2025 851st yeminghan2021 856 99 57ms 3 Feb 2025 852nd DialFrost 🇸🇬 855 50 226ms 24 Oct 2023 853rd henrydukepickle 855 97 132ms 8 Jul 2025 854th eshilo-draper 854 91 425ms 4 Sep 2022 854th ericlangedijk 🇸🇮 854 91 437ms 23 May 2023 854th KatieLG 🇬🇧 854 91 413ms 30 Apr 2024 854th Mikey-Beep 🇬🇧 854 91 403ms 3 Sep 2024 858th MeWhenI 🇻🇦 854 92 467ms 10 Oct 2022 858th Betuaredead 854 92 480ms 5 Jan 2023 858th Yax42 🇫🇷 854 92 459ms 4 Oct 2025 861st Yewzir 🇧🇪 853 65 4ms 9 Oct 2023 861st MeWhenI 🇻🇦 853 65 4ms 10 Oct 2023 863rd DialFrost 🇸🇬 853 86 1,299ms 10 Mar 2025 864th o0lit3 🇺🇸 852 54 7ms 22 Jun 2023 864th Natanaelel 🇸🇪 852 54 7ms 10 Feb 2025 866th DialFrost 🇸🇬 852 76 82ms 17 Mar 2025 867th Shanethegamer 🇺🇸 851 99 25ms 27 Apr 2023 868th mtirado1 850 74 94ms 24 Dec 2022 868th Betuaredead 850 74 88ms 6 Jan 2023 868th KatieLG 🇬🇧 850 74 94ms 15 Jan 2023 868th bwat2 850 74 87ms 31 Mar 2023 868th stackotter 850 74 91ms 29 May 2023 868th ovs-code 🇩🇪 850 74 93ms 17 Apr 2024 874th JayXon 🇺🇸 849 56 1,560ms 9 May 2022 875th the-zammers 848 68 165ms 2 Oct 2023 876th dokutan 848 82 21ms 1 Jul 2024 877th lynn 848 96 29ms 11 Jul 2023 878th shinh 847 52 43ms 29 Jun 2022 878th MeWhenI 🇻🇦 847 52 70ms 25 Jul 2023 880th jared-hughes 847 100 63ms 20 Jul 2022 First Prev 801–880 of 3,746 Next Last