Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 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 Calendar Connect Four 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Calendar Connect Four 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 367th SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 367th Andrey-Plotnikov 907 59 10ms 19 May 2024 367th emgordon154 907 59 10ms 5 Aug 2024 367th duckyluuk 🇳🇱 907 59 11ms 3 Oct 2024 367th lifthrasiir 🇰🇷 907 59 13ms 23 Nov 2024 367th fuzzylojik-golf 🇺🇸 907 59 10ms 1 Jun 2025 367th acollett89 907 59 11ms 17 Jun 2025 367th iczelia 🇩🇪 907 59 14ms 23 Sep 2025 384th edsrzf 🇳🇿 907 83 41ms 14 Jan 2025 384th kg583 🇺🇸 907 83 39ms 14 Feb 2025 386th nipzu 906 48 55ms 8 Sep 2024 387th Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 387th error256 906 80 130ms 8 Apr 2025 389th Shanethegamer 🇺🇸 906 82 19ms 19 Dec 2023 389th edsrzf 🇳🇿 906 82 19ms 6 Jan 2025 391st krcs 🇵🇱 906 86 325ms 10 May 2022 391st billings7 🇬🇧 906 86 411ms 15 May 2022 391st revlayle 🇺🇸 906 86 353ms 7 Dec 2022 391st Widgitty 906 86 356ms 1 Sep 2023 391st albanian-laundromat 906 86 319ms 30 Sep 2025 396th shinh 905 52 42ms 29 Jun 2022 397th Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 398th Lydxn 🇨🇦 905 70 89ms 7 May 2022 399th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 400th Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 400th jared-hughes 904 72 4ms 4 May 2022 400th Waffle3z 904 72 7ms 5 May 2022 400th m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 400th GrayJoKing 🇦🇺 904 72 104ms 22 Oct 2022 400th emplv 🇱🇻 904 72 104ms 27 Oct 2022 400th sean-niemann 🇺🇸 904 72 110ms 7 Mar 2025 400th Blendi-Goose 904 72 6ms 16 Mar 2025 400th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 400th sean-niemann 🇺🇸 904 72 6ms 16 Oct 2025 410th Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 410th sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 412th stefangimmillaro 903 92 131ms 24 Oct 2023 412th inverseLorentz 🇦🇺 903 92 124ms 27 May 2024 412th sean-niemann 🇺🇸 903 92 124ms 8 Jun 2025 415th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 415th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 415th btnlq 902 69 7ms 24 Sep 2022 418th michael-pruglo 🇺🇦 902 94 54ms 5 Jul 2022 418th zygoloid 902 94 54ms 5 Aug 2024 420th SirBogman 🇺🇸 900 50 414ms 5 May 2022 420th nwellnhof 🇩🇪 900 50 429ms 3 Jun 2022 420th Lydxn 🇨🇦 900 50 415ms 15 Aug 2022 420th Steffan153 🇫🇮 900 50 448ms 9 Aug 2024 424th Lydxn 🇨🇦 900 108 260ms 6 May 2022 424th CaedenHarper 🇨🇦 900 108 256ms 5 Oct 2025 426th DialFrost 🇸🇬 899 69 94ms 15 Jul 2024 427th Lydxn 🇨🇦 898 48 285ms 5 May 2022 427th p-zubieta 898 48 249ms 6 Mar 2024 429th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 429th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 429th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 429th trinityy-7 898 70 2ms 7 Aug 2025 429th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 434th Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 435th edsrzf 🇳🇿 898 78 11ms 26 Oct 2024 435th kg583 🇺🇸 898 78 11ms 25 Sep 2025 437th GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 438th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 439th Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 439th rucin93 🇵🇱 897 59 136ms 13 Oct 2024 439th sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 439th lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 443rd nwellnhof 🇩🇪 896 69 22ms 4 May 2022 443rd m-tkach 🇺🇦 896 69 18ms 4 May 2022 443rd GolfingSuccess 🇬🇷 896 69 16ms 5 May 2022 443rd jared-hughes 896 69 34ms 5 May 2022 443rd ovs-code 🇩🇪 896 69 22ms 5 May 2022 443rd btnlq 896 69 16ms 5 May 2022 443rd sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 443rd lynn 896 69 17ms 22 Aug 2022 First Prev 376–450 of 3,468 Next Last