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 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 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 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 Bytes Time Submitted 301st xnor-gate 920 63 187ms 20 Jan 2025 302nd pardouin 🇫🇷 919 72 2,899ms 21 May 2025 303rd primo-ppcg 🇹🇭 918 61 6ms 6 May 2022 303rd sisyphus-ppcg 🇦🇺 918 61 9ms 14 Jul 2022 305th Lydxn 🇨🇦 918 70 96ms 7 May 2022 305th JayXon 🇺🇸 918 70 96ms 7 May 2022 307th JayXon 🇺🇸 918 79 570ms 5 Apr 2023 307th Lydxn 🇨🇦 918 79 543ms 9 Apr 2023 309th JayXon 🇺🇸 918 105 246ms 4 Oct 2025 310th Steffan153 🇫🇮 917 71 98ms 14 Oct 2022 310th Shanethegamer 🇺🇸 917 71 100ms 15 Oct 2022 310th stefangimmillaro 917 71 100ms 16 Oct 2022 310th MeWhenI 🇻🇦 917 71 100ms 16 Oct 2022 310th Steffan153 🇫🇮 917 71 4ms 10 Dec 2022 310th synt7x 🇺🇸 917 71 4ms 7 Jul 2025 316th annaproxy 917 79 111ms 24 Aug 2022 316th GrayJoKing 🇦🇺 917 79 83ms 28 Aug 2022 316th IanUtley 917 79 114ms 3 Nov 2023 316th Kacarott 🇦🇺 917 79 117ms 13 Jun 2024 320th Steffan153 🇫🇮 917 81 24ms 11 Dec 2023 321st arctouch-cristiannevianna 916 85 341ms 3 Apr 2023 321st tomtheisen 🇺🇸 916 85 396ms 10 Apr 2025 323rd Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 323rd JayXon 🇺🇸 916 87 508ms 15 May 2023 323rd Steffan153 🇫🇮 916 87 389ms 16 May 2023 323rd Lydxn 🇨🇦 916 87 465ms 16 May 2023 323rd GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 323rd sean-niemann 🇺🇸 916 87 436ms 11 Jul 2024 329th kmathis22 916 91 548ms 22 days ago 330th Natanaelel 🇸🇪 915 57 417ms 17 Jan 2024 330th Kacarott 🇦🇺 915 57 394ms 10 Sep 2024 332nd Shanethegamer 🇺🇸 915 61 3ms 9 Oct 2023 332nd edsrzf 🇳🇿 915 61 3ms 4 Jul 2025 334th ovs-code 🇩🇪 915 75 78ms 12 Sep 2024 334th Kacarott 🇦🇺 915 75 62ms 13 Sep 2024 336th Lydxn 🇨🇦 914 81 39ms 1 Apr 2023 337th andersk 🇺🇸 914 91 124ms 25 Oct 2022 337th Super-Pizza 🇨🇦 914 91 124ms 4 Dec 2022 337th klixel 🇨🇦 914 91 125ms 20 May 2023 337th lynn 914 91 122ms 6 Jul 2024 337th edsrzf 🇳🇿 914 91 125ms 29 Nov 2024 337th DialFrost 🇸🇬 914 91 136ms 7 Apr 2025 343rd lynn 913 78 1,300ms 5 May 2022 344th GrayJoKing 🇦🇺 912 71 267ms 10 Aug 2023 345th tailorspy 912 93 57ms 27 May 2024 345th sean-niemann 🇺🇸 912 93 55ms 9 Jun 2025 345th KasperKivimaeki 🇫🇮 912 93 56ms 26 Oct 2025 348th nai62 911 69 7ms 27 Aug 2022 349th GolfingSuccess 🇬🇷 910 64 91ms 14 Dec 2024 349th MeWhenI 🇻🇦 910 64 91ms 24 Dec 2024 349th GrayJoKing 🇦🇺 910 64 92ms 17 days ago 352nd Shanethegamer 🇺🇸 910 77 13ms 15 May 2023 353rd primo-ppcg 🇹🇭 910 93 30ms 7 May 2022 353rd AlephSquirrel 910 93 26ms 21 Jan 2023 353rd kg583 🇺🇸 910 93 29ms 26 Dec 2024 353rd CLOStrophobic 🇮🇹 910 93 30ms 17 Jan 2025 353rd edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 358th MeWhenI 🇻🇦 909 63 184ms 5 May 2022 359th Lydxn 🇨🇦 909 68 464ms 5 May 2022 359th GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 359th Bubbler-4 909 68 15ms 15 Nov 2022 359th Rubiksmath 909 68 14ms 14 Aug 2023 363rd edsrzf 🇳🇿 909 72 160ms 3 Jul 2025 364th marshallward 🇺🇸 909 83 41ms 10 May 2022 365th ovs-code 🇩🇪 909 84 63ms 25 Sep 2022 365th GrayJoKing 🇦🇺 909 84 66ms 11 Aug 2023 365th edsrzf 🇳🇿 909 84 78ms 12 Nov 2025 368th Betuaredead 908 60 5ms 5 Jan 2023 368th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 368th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 368th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 368th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 368th sean-niemann 🇺🇸 908 60 9ms 7 Mar 2025 374th DialFrost 🇸🇬 908 76 154ms 3 Aug 2025 375th edsrzf 🇳🇿 908 83 43ms 14 Jan 2025 First Prev 301–375 of 3,518 Next Last