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 801st dokutan 859 79 10ms 27 Apr 2024 801st SwordF-Official 🇺🇸 859 79 10ms 1 Feb 2026 803rd MeWhenI 🇻🇦 859 81 8ms 23 May 2023 803rd Shanethegamer 🇺🇸 859 81 18ms 19 Dec 2023 803rd emgordon154 859 81 20ms 29 Jul 2025 806th MeWhenI 🇻🇦 859 145 1,417ms 28 Mar 2025 807th JRaspass 🇬🇧 858 41 445ms 4 May 2022 807th SirBogman 🇺🇸 858 41 275ms 4 May 2022 807th Natanaelel 🇸🇪 858 41 434ms 4 May 2022 810th 5quiwyrm 858 52 304ms 4 Sep 2022 810th MeWhenI 🇻🇦 858 52 318ms 28 Jan 2023 810th Feniske 🇫🇷 858 52 317ms 7 Nov 2023 810th dcgjb 858 52 279ms 29 Jan 2024 810th JPRuskin 🇬🇧 858 52 314ms 7 Apr 2025 810th IISResetMe 858 52 325ms 7 Apr 2025 810th Ripick 858 52 315ms 1 Jun 2025 810th madex 🇩🇪 858 52 363ms 18 days ago 818th jared-hughes 858 72 2ms 6 Jul 2022 818th Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 818th MeWhenI 🇻🇦 858 72 2ms 7 May 2023 818th ListeriaM 858 72 2ms 22 Aug 2023 818th larcherMTT 858 72 2ms 5 Oct 2024 818th snyderek 🇺🇸 858 72 2ms 19 Feb 2025 818th 5quiwyrm 858 72 2ms 29 Jun 2025 818th TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 818th xiaoyiming123 858 72 2ms 12 Jul 2025 827th ovs-code 🇩🇪 857 83 57ms 1 Jul 2024 828th 386asm 🇺🇸 857 86 40ms 9 Apr 2023 828th DialFrost 🇸🇬 857 86 43ms 30 Dec 2025 830th Liibe 857 97 477ms 25 Sep 2025 830th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 832nd frankgraziano 857 198 108ms 14 Oct 2025 833rd typeswitch-dev 🇵🇹 856 75 5ms 22 Jul 2023 834th nwellnhof 🇩🇪 856 111 301ms 4 May 2022 834th stefangimmillaro 856 111 310ms 26 Sep 2023 834th kkoenig 856 111 290ms 4 Jan 2024 837th Frowny 855 38 40ms 5 May 2022 837th stackofbears 855 38 42ms 14 Mar 2025 839th DialFrost 🇸🇬 855 50 266ms 24 Oct 2023 840th Shanethegamer 🇺🇸 855 70 104ms 12 Dec 2022 840th Alessandro-Balconi 🇮🇹 855 70 103ms 26 Dec 2022 840th snoozingnewt 🇨🇦 855 70 210ms 22 Nov 2025 843rd aditsu 855 77 2,622ms 23 Nov 2025 844th henrydukepickle 855 97 125ms 8 Jul 2025 845th yeminghan2021 855 99 58ms 3 Feb 2025 846th ovs-code 🇩🇪 855 161 1,719ms 14 Sep 2025 847th eshilo-draper 853 91 358ms 4 Sep 2022 847th ericlangedijk 🇸🇮 853 91 369ms 23 May 2023 847th KatieLG 🇬🇧 853 91 377ms 30 Apr 2024 847th Mikey-Beep 🇬🇧 853 91 365ms 3 Sep 2024 851st MeWhenI 🇻🇦 853 92 467ms 10 Oct 2022 851st Betuaredead 853 92 480ms 5 Jan 2023 851st Yax42 🇫🇷 853 92 470ms 4 Oct 2025 854th Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 854th MeWhenI 🇻🇦 852 65 4ms 10 Oct 2023 856th Shanethegamer 🇺🇸 852 83 1,252ms 4 May 2022 857th o0lit3 🇺🇸 851 54 7ms 22 Jun 2023 857th Natanaelel 🇸🇪 851 54 11ms 10 Feb 2025 859th mtirado1 850 74 91ms 24 Dec 2022 859th Betuaredead 850 74 95ms 6 Jan 2023 859th KatieLG 🇬🇧 850 74 91ms 15 Jan 2023 859th bwat2 850 74 88ms 31 Mar 2023 859th stackotter 850 74 90ms 29 May 2023 859th ovs-code 🇩🇪 850 74 85ms 17 Apr 2024 865th Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 866th JayXon 🇺🇸 848 56 1,287ms 9 May 2022 867th dokutan 848 82 21ms 1 Jul 2024 868th the-zammers 847 68 165ms 2 Oct 2023 869th lynn 847 96 29ms 11 Jul 2023 870th jared-hughes 847 100 58ms 20 Jul 2022 870th ZakkkkAttackkkk 🇵🇭 847 100 64ms 10 Aug 2022 870th Walter225 847 100 62ms 25 Jul 2023 873rd MeWhenI 🇻🇦 846 26 160ms 25 Aug 2022 873rd AlephSquirrel 846 26 157ms 6 Jan 2023 873rd ovs-code 🇩🇪 846 26 367ms 5 May 2024 873rd saito-ta 🇯🇵 846 26 154ms 12 Dec 2024 877th shinh 846 52 43ms 29 Jun 2022 877th MeWhenI 🇻🇦 846 52 67ms 25 Jul 2023 879th Natanaelel 🇸🇪 846 57 459ms 17 Jan 2024 879th Kacarott 🇦🇺 846 57 402ms 10 Sep 2024 First Prev 801–880 of 3,639 Next Last