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 ><> 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 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 ><> 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 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 799th MeWhenI 🇻🇦 858 72 3ms 7 May 2023 799th ListeriaM 858 72 2ms 22 Aug 2023 799th larcherMTT 858 72 2ms 5 Oct 2024 799th snyderek 🇺🇸 858 72 3ms 19 Feb 2025 799th 5quiwyrm 858 72 2ms 29 Jun 2025 799th TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 799th xiaoyiming123 858 72 2ms 12 Jul 2025 808th dokutan 858 79 11ms 27 Apr 2024 808th SwordF-Official 🇺🇸 858 79 10ms 7 days ago 810th DialFrost 🇸🇬 857 83 19ms 1 Jan 2026 811th Liibe 857 97 477ms 25 Sep 2025 811th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 813th typeswitch-dev 🇵🇹 856 75 5ms 22 Jul 2023 814th ovs-code 🇩🇪 856 83 54ms 1 Jul 2024 815th 386asm 🇺🇸 856 86 40ms 9 Apr 2023 815th DialFrost 🇸🇬 856 86 43ms 30 Dec 2025 817th nwellnhof 🇩🇪 856 111 268ms 4 May 2022 817th stefangimmillaro 856 111 297ms 26 Sep 2023 817th kkoenig 856 111 283ms 4 Jan 2024 820th frankgraziano 856 198 108ms 14 Oct 2025 821st Frowny 855 38 40ms 5 May 2022 821st stackofbears 855 38 42ms 14 Mar 2025 823rd DialFrost 🇸🇬 855 50 260ms 24 Oct 2023 824th yeminghan2021 855 99 54ms 3 Feb 2025 825th ovs-code 🇩🇪 855 161 1,719ms 14 Sep 2025 826th Shanethegamer 🇺🇸 854 70 99ms 12 Dec 2022 826th Alessandro-Balconi 🇮🇹 854 70 95ms 26 Dec 2022 826th snoozingnewt 🇨🇦 854 70 207ms 22 Nov 2025 829th henrydukepickle 854 97 122ms 8 Jul 2025 830th aditsu 853 77 2,303ms 23 Nov 2025 831st eshilo-draper 853 91 396ms 4 Sep 2022 831st ericlangedijk 🇸🇮 853 91 428ms 23 May 2023 831st KatieLG 🇬🇧 853 91 419ms 30 Apr 2024 831st Mikey-Beep 🇬🇧 853 91 388ms 3 Sep 2024 835th MeWhenI 🇻🇦 853 92 398ms 10 Oct 2022 835th Betuaredead 853 92 468ms 5 Jan 2023 835th Yax42 🇫🇷 853 92 420ms 4 Oct 2025 838th Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 838th MeWhenI 🇻🇦 852 65 3ms 10 Oct 2023 840th Shanethegamer 🇺🇸 852 83 1,374ms 4 May 2022 841st o0lit3 🇺🇸 851 54 7ms 22 Jun 2023 841st Natanaelel 🇸🇪 851 54 7ms 10 Feb 2025 843rd Shanethegamer 🇺🇸 851 58 1,035ms 17 Sep 2025 844th SirBogman 🇺🇸 850 55 38ms 5 May 2022 844th olivermrose 🇺🇸 850 55 42ms 6 May 2022 844th 4hg 🇺🇸 850 55 51ms 24 Aug 2022 844th DialFrost 🇸🇬 850 55 43ms 1 Jan 2023 844th error256 850 55 40ms 4 May 2024 849th mtirado1 850 74 79ms 24 Dec 2022 849th Betuaredead 850 74 81ms 6 Jan 2023 849th KatieLG 🇬🇧 850 74 81ms 15 Jan 2023 849th bwat2 850 74 82ms 31 Mar 2023 849th stackotter 850 74 78ms 29 May 2023 849th ovs-code 🇩🇪 850 74 82ms 17 Apr 2024 849th madeforlosers 850 74 80ms 21 Nov 2024 856th Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 857th JayXon 🇺🇸 848 56 1,287ms 9 May 2022 858th the-zammers 847 68 172ms 2 Oct 2023 859th lynn 847 96 29ms 11 Jul 2023 860th MeWhenI 🇻🇦 846 26 155ms 25 Aug 2022 860th AlephSquirrel 846 26 152ms 6 Jan 2023 860th ovs-code 🇩🇪 846 26 373ms 5 May 2024 860th saito-ta 🇯🇵 846 26 150ms 12 Dec 2024 864th randolchance 846 63 11ms 8 Jan 2023 864th CatsAreFluffy 846 63 12ms 18 Feb 2023 864th amiralitaheri 846 63 14ms 23 Feb 2023 864th RuyiLi 846 63 11ms 1 Apr 2023 864th TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 864th pfysches-boop 846 63 10ms 6 Aug 2023 864th mhgockel 846 63 10ms 19 Aug 2023 864th NickTheEASDude 🇺🇸 846 63 12ms 18 Jan 2024 864th 823126 846 63 15ms 14 Nov 2024 864th Palladium02 846 63 10ms 12 May 2025 864th 4very 846 63 11ms 10 Jun 2025 864th Ultra814 846 63 10ms 21 Aug 2025 876th NewDefectus 🇮🇱 846 73 3ms 6 May 2022 876th inventshah 846 73 2ms 12 Jun 2022 876th Natanaelel 🇸🇪 846 73 3ms 15 Jun 2022 876th Herbert00709 🇵🇱 846 73 2ms 22 Dec 2023 876th LorenzoDeGaspari 846 73 2ms 27 May 2024 First Prev 801–880 of 3,547 Next Last