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 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 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 Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 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 Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 800th MeWhenI 🇻🇦 858 52 301ms 28 Jan 2023 800th Feniske 🇫🇷 858 52 289ms 7 Nov 2023 800th dcgjb 858 52 277ms 29 Jan 2024 800th JPRuskin 🇬🇧 858 52 284ms 7 Apr 2025 800th IISResetMe 858 52 309ms 7 Apr 2025 800th Ripick 858 52 303ms 1 Jun 2025 807th jared-hughes 858 72 2ms 6 Jul 2022 807th Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 807th MeWhenI 🇻🇦 858 72 2ms 7 May 2023 807th ListeriaM 858 72 2ms 22 Aug 2023 807th larcherMTT 858 72 2ms 5 Oct 2024 807th snyderek 🇺🇸 858 72 2ms 19 Feb 2025 807th 5quiwyrm 858 72 2ms 29 Jun 2025 807th TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 807th xiaoyiming123 858 72 2ms 12 Jul 2025 816th dokutan 858 79 10ms 27 Apr 2024 816th SwordF-Official 🇺🇸 858 79 10ms 20 days ago 818th DialFrost 🇸🇬 857 83 19ms 1 Jan 2026 819th Liibe 857 97 477ms 25 Sep 2025 819th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 821st frankgraziano 857 198 108ms 14 Oct 2025 822nd typeswitch-dev 🇵🇹 856 75 5ms 22 Jul 2023 823rd ovs-code 🇩🇪 856 83 57ms 1 Jul 2024 824th 386asm 🇺🇸 856 86 40ms 9 Apr 2023 824th DialFrost 🇸🇬 856 86 43ms 30 Dec 2025 826th nwellnhof 🇩🇪 856 111 285ms 4 May 2022 826th stefangimmillaro 856 111 285ms 26 Sep 2023 826th kkoenig 856 111 290ms 4 Jan 2024 829th Frowny 855 38 40ms 5 May 2022 829th stackofbears 855 38 42ms 14 Mar 2025 831st DialFrost 🇸🇬 855 50 266ms 24 Oct 2023 832nd yeminghan2021 855 99 54ms 3 Feb 2025 833rd ovs-code 🇩🇪 855 161 1,719ms 14 Sep 2025 834th Shanethegamer 🇺🇸 854 70 99ms 12 Dec 2022 834th Alessandro-Balconi 🇮🇹 854 70 95ms 26 Dec 2022 834th snoozingnewt 🇨🇦 854 70 207ms 22 Nov 2025 837th henrydukepickle 854 97 128ms 8 Jul 2025 838th aditsu 853 77 2,303ms 23 Nov 2025 839th eshilo-draper 853 91 392ms 4 Sep 2022 839th ericlangedijk 🇸🇮 853 91 398ms 23 May 2023 839th KatieLG 🇬🇧 853 91 411ms 30 Apr 2024 839th Mikey-Beep 🇬🇧 853 91 388ms 3 Sep 2024 843rd MeWhenI 🇻🇦 853 92 467ms 10 Oct 2022 843rd Betuaredead 853 92 480ms 5 Jan 2023 843rd Yax42 🇫🇷 853 92 470ms 4 Oct 2025 846th Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 846th MeWhenI 🇻🇦 852 65 3ms 10 Oct 2023 848th Shanethegamer 🇺🇸 852 83 1,374ms 4 May 2022 849th o0lit3 🇺🇸 851 54 7ms 22 Jun 2023 849th Natanaelel 🇸🇪 851 54 7ms 10 Feb 2025 851st SirBogman 🇺🇸 850 55 38ms 5 May 2022 851st olivermrose 🇺🇸 850 55 42ms 6 May 2022 851st 4hg 🇺🇸 850 55 50ms 24 Aug 2022 851st DialFrost 🇸🇬 850 55 43ms 1 Jan 2023 851st error256 850 55 40ms 4 May 2024 856th mtirado1 850 74 79ms 24 Dec 2022 856th Betuaredead 850 74 81ms 6 Jan 2023 856th KatieLG 🇬🇧 850 74 81ms 15 Jan 2023 856th bwat2 850 74 82ms 31 Mar 2023 856th stackotter 850 74 78ms 29 May 2023 856th ovs-code 🇩🇪 850 74 82ms 17 Apr 2024 856th madeforlosers 850 74 80ms 21 Nov 2024 863rd Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 864th JayXon 🇺🇸 848 56 1,287ms 9 May 2022 865th the-zammers 847 68 165ms 2 Oct 2023 866th lynn 847 96 29ms 11 Jul 2023 867th jared-hughes 847 100 58ms 20 Jul 2022 867th ZakkkkAttackkkk 🇵🇭 847 100 56ms 10 Aug 2022 867th Walter225 847 100 58ms 25 Jul 2023 870th MeWhenI 🇻🇦 846 26 155ms 25 Aug 2022 870th AlephSquirrel 846 26 151ms 6 Jan 2023 870th ovs-code 🇩🇪 846 26 373ms 5 May 2024 870th saito-ta 🇯🇵 846 26 150ms 12 Dec 2024 874th randolchance 846 63 12ms 8 Jan 2023 874th CatsAreFluffy 846 63 11ms 18 Feb 2023 874th amiralitaheri 846 63 11ms 23 Feb 2023 874th RuyiLi 846 63 11ms 1 Apr 2023 874th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 874th pfysches-boop 846 63 11ms 6 Aug 2023 874th mhgockel 846 63 14ms 19 Aug 2023 First Prev 801–880 of 3,570 Next Last