Collatz in all languages in bytes. 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 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 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 Calendar 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 Multitap Input NFA Simulator 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 Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Calendar 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 Multitap Input NFA Simulator 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 Bytes Time Submitted 505th xyangst 892 60 10ms 28 Sep 2024 505th a6166231 🇨🇳 892 60 9ms 15 May 2025 505th Protothor 892 60 10ms 8 Jul 2025 505th SebassNoob 892 60 10ms 5 Aug 2025 505th Yax42 🇫🇷 892 60 10ms 5 Sep 2025 505th levinwinter 892 60 10ms 22 Oct 2025 505th Cube14yt 892 60 10ms 21 days ago 505th gigaprofisi 🇺🇸 892 60 10ms 19 days ago 534th stefangimmillaro 892 71 89ms 2 Oct 2022 534th Steffan153 🇫🇮 892 71 90ms 23 Feb 2023 534th Shanethegamer 🇺🇸 892 71 89ms 16 May 2023 534th sean-niemann 🇺🇸 892 71 87ms 12 Jul 2024 538th RockOfStone 892 73 5ms 20 Oct 2025 539th sean-niemann 🇺🇸 892 109 260ms 25 May 2024 539th GolfingSuccess 🇬🇷 892 109 267ms 6 Sep 2025 541st lynn 891 65 316ms 5 May 2022 541st GrayJoKing 🇦🇺 891 65 327ms 5 May 2022 541st Sakisan 🇧🇪 891 65 214ms 6 May 2022 541st JayXon 🇺🇸 891 65 366ms 17 Oct 2022 541st Steffan153 🇫🇮 891 65 172ms 12 Nov 2022 541st tobeannouncd 891 65 331ms 25 Apr 2025 541st sean-niemann 🇺🇸 891 65 174ms 9 Jun 2025 548th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 549th DialFrost 🇸🇬 891 95 32ms 10 Dec 2024 550th canissimia 🇦🇶 891 110 2,640ms 20 Feb 2023 551st jared-hughes 891 130 23ms 15 Dec 2024 552nd primo-ppcg 🇹🇭 890 52 211ms 5 May 2022 552nd dvargas46 🇺🇸 890 52 86ms 22 Dec 2022 554th canissimia 🇦🇶 890 204 16ms 25 Nov 2023 555th mousetail 🇳🇱 888 41 73ms 29 Aug 2025 556th MeWhenI 🇻🇦 888 53 41ms 1 Jun 2022 556th stefangimmillaro 888 53 38ms 2 Oct 2022 556th Haksell 🇦🇶 888 53 40ms 22 Feb 2023 559th primo-ppcg 🇹🇭 888 85 43ms 14 Jan 2025 559th MeWhenI 🇻🇦 888 85 44ms 21 Apr 2025 561st albanian-laundromat 887 94 339ms 24 Sep 2025 561st jkelly467 887 94 339ms 23 Oct 2025 561st HumanoidCPU 887 94 337ms 8 Nov 2025 564th Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 564th Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 566th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 566th emplv 🇱🇻 886 71 3ms 5 May 2022 566th JayXon 🇺🇸 886 71 2ms 7 May 2022 566th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 566th stefangimmillaro 886 71 2ms 2 Jun 2023 566th 09cf 886 71 2ms 4 Oct 2023 566th kkoenig 886 71 3ms 21 Dec 2023 566th sean-niemann 🇺🇸 886 71 3ms 10 Jul 2024 566th masinag 🇮🇹 886 71 2ms 6 Oct 2024 575th ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 576th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 576th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 576th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 576th Ripick 886 90 439ms 27 Nov 2024 580th m-tkach 🇺🇦 886 112 118ms 22 Jun 2025 581st SiestaGuru 885 88 314ms 9 Jan 2023 581st rifatx 885 88 327ms 5 Jul 2024 581st kmathis22 885 88 343ms 25 Sep 2025 581st arcpolaris 885 88 344ms 8 Nov 2025 585th snoozingnewt 🇨🇦 885 96 97ms 3 days ago 586th m-tkach 🇺🇦 884 59 440ms 21 Jan 2024 586th GolfingSuccess 🇬🇷 884 59 506ms 20 Jan 2025 586th duckyluuk 🇳🇱 884 59 416ms 2 days ago 589th steffan-polygolf 884 74 126ms 14 Feb 2024 590th kg583 🇺🇸 884 84 18ms 30 Jul 2025 591st nipzu 884 94 126ms 17 May 2022 591st Natanaelel 🇸🇪 884 94 122ms 17 Jun 2022 591st nkoppel 884 94 123ms 19 Oct 2022 591st ovs-code 🇩🇪 884 94 125ms 21 Jun 2023 591st mousetail 🇳🇱 884 94 127ms 12 Jan 2024 596th MeWhenI 🇻🇦 884 110 260ms 9 Feb 2023 596th edsrzf 🇳🇿 884 110 255ms 28 Nov 2024 596th targrik 884 110 265ms 30 Jun 2025 599th MichalMarsalek 🇨🇿 883 70 22ms 5 May 2022 599th primo-ppcg 🇹🇭 883 70 23ms 5 May 2022 First Prev 526–600 of 3,509 Next Last