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 800th SwordF-Official 🇺🇸 860 79 10ms 1 Feb 2026 802nd MeWhenI 🇻🇦 860 81 8ms 23 May 2023 802nd Shanethegamer 🇺🇸 860 81 18ms 19 Dec 2023 802nd emgordon154 860 81 20ms 29 Jul 2025 805th ulucs 859 35 9ms 8 May 2022 805th bstrat 859 35 9ms 6 Jun 2024 805th wh3n3v3r 🇨🇿 859 35 8ms 18 Nov 2024 808th JRaspass 🇬🇧 859 41 409ms 4 May 2022 808th SirBogman 🇺🇸 859 41 274ms 4 May 2022 808th Natanaelel 🇸🇪 859 41 384ms 4 May 2022 811th 5quiwyrm 859 52 262ms 4 Sep 2022 811th MeWhenI 🇻🇦 859 52 278ms 28 Jan 2023 811th Feniske 🇫🇷 859 52 301ms 7 Nov 2023 811th dcgjb 859 52 278ms 29 Jan 2024 811th JPRuskin 🇬🇧 859 52 314ms 7 Apr 2025 811th IISResetMe 859 52 327ms 7 Apr 2025 811th Ripick 859 52 281ms 1 Jun 2025 811th madex 🇩🇪 859 52 300ms 16 Mar 2026 819th typeswitch-dev 🇵🇹 859 75 4ms 22 Jul 2023 820th MeWhenI 🇻🇦 859 145 1,491ms 28 Mar 2025 821st frankgraziano 859 198 108ms 14 Oct 2025 822nd jared-hughes 858 72 2ms 6 Jul 2022 822nd Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 822nd MeWhenI 🇻🇦 858 72 2ms 7 May 2023 822nd ListeriaM 858 72 2ms 22 Aug 2023 822nd larcherMTT 858 72 2ms 5 Oct 2024 822nd snyderek 🇺🇸 858 72 2ms 19 Feb 2025 822nd 5quiwyrm 858 72 2ms 29 Jun 2025 822nd TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 822nd xiaoyiming123 858 72 2ms 12 Jul 2025 831st ovs-code 🇩🇪 858 83 57ms 1 Jul 2024 832nd 386asm 🇺🇸 858 86 40ms 9 Apr 2023 832nd DialFrost 🇸🇬 858 86 43ms 30 Dec 2025 834th Shanethegamer 🇺🇸 857 70 104ms 12 Dec 2022 834th Alessandro-Balconi 🇮🇹 857 70 102ms 26 Dec 2022 834th snoozingnewt 🇨🇦 857 70 210ms 22 Nov 2025 837th aditsu 857 77 2,321ms 23 Nov 2025 838th Liibe 857 97 471ms 25 Sep 2025 838th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 840th nwellnhof 🇩🇪 857 111 308ms 4 May 2022 840th stefangimmillaro 857 111 341ms 26 Sep 2023 840th kkoenig 857 111 319ms 4 Jan 2024 843rd Frowny 856 38 40ms 5 May 2022 843rd stackofbears 856 38 42ms 14 Mar 2025 845th DialFrost 🇸🇬 856 50 226ms 24 Oct 2023 846th yeminghan2021 856 99 69ms 3 Feb 2025 847th emgordon154 856 159 1,737ms 24 Dec 2025 847th DialFrost 🇸🇬 856 159 1,683ms 17 Jan 2026 849th henrydukepickle 855 97 132ms 8 Jul 2025 850th DialFrost 🇸🇬 854 86 1,299ms 10 Mar 2025 851st eshilo-draper 854 91 412ms 4 Sep 2022 851st ericlangedijk 🇸🇮 854 91 435ms 23 May 2023 851st KatieLG 🇬🇧 854 91 462ms 30 Apr 2024 851st Mikey-Beep 🇬🇧 854 91 403ms 3 Sep 2024 855th MeWhenI 🇻🇦 854 92 467ms 10 Oct 2022 855th Betuaredead 854 92 480ms 5 Jan 2023 855th Yax42 🇫🇷 854 92 459ms 4 Oct 2025 858th o0lit3 🇺🇸 853 54 7ms 22 Jun 2023 858th Natanaelel 🇸🇪 853 54 7ms 10 Feb 2025 860th Yewzir 🇧🇪 853 65 4ms 9 Oct 2023 860th MeWhenI 🇻🇦 853 65 4ms 10 Oct 2023 862nd mtirado1 851 74 94ms 24 Dec 2022 862nd Betuaredead 851 74 93ms 6 Jan 2023 862nd KatieLG 🇬🇧 851 74 94ms 15 Jan 2023 862nd bwat2 851 74 87ms 31 Mar 2023 862nd stackotter 851 74 91ms 29 May 2023 862nd ovs-code 🇩🇪 851 74 93ms 17 Apr 2024 868th Shanethegamer 🇺🇸 851 99 25ms 27 Apr 2023 869th JayXon 🇺🇸 850 56 1,560ms 9 May 2022 870th DialFrost 🇸🇬 850 76 82ms 17 Mar 2025 871st dokutan 849 82 21ms 1 Jul 2024 872nd the-zammers 848 68 165ms 2 Oct 2023 873rd lynn 848 96 29ms 11 Jul 2023 874th shinh 847 52 42ms 29 Jun 2022 874th MeWhenI 🇻🇦 847 52 67ms 25 Jul 2023 876th jared-hughes 847 100 62ms 20 Jul 2022 876th ZakkkkAttackkkk 🇵🇭 847 100 61ms 10 Aug 2022 876th Walter225 847 100 59ms 25 Jul 2023 879th MeWhenI 🇻🇦 846 26 160ms 25 Aug 2022 879th AlephSquirrel 846 26 157ms 6 Jan 2023 First Prev 801–880 of 3,765 Next Last