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 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 Bytes Time Submitted 881st Liibe 860 97 477ms 25 Sep 2025 882nd stefangimmillaro 860 112 285ms 26 Sep 2023 882nd kkoenig 860 112 290ms 4 Jan 2024 884th Yewzir 🇧🇪 859 65 4ms 9 Oct 2023 884th MeWhenI 🇻🇦 859 65 3ms 10 Oct 2023 886th scpchicken 🇵🇼 859 72 20ms 4 May 2022 886th sultan 859 72 17ms 6 Jun 2022 886th annaproxy 859 72 22ms 22 Aug 2022 886th BlankSpruce 859 72 24ms 9 Sep 2022 886th ValentinCassayre 859 72 21ms 8 Oct 2022 886th mathb0y512 859 72 24ms 1 Dec 2022 886th NoahBolohan 🇨🇦 859 72 25ms 28 Feb 2023 886th neel11235813 859 72 22ms 8 Mar 2023 886th Kacarott 🇦🇺 859 72 17ms 24 Mar 2023 886th Fracture17 859 72 19ms 8 Apr 2023 886th ayushdewan 859 72 25ms 7 May 2023 886th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 886th Glinte 859 72 24ms 11 Dec 2023 886th nanatsu8 859 72 26ms 11 May 2024 886th thej10n 859 72 20ms 12 Jun 2024 886th tobeannouncd 859 72 19ms 25 Apr 2025 886th YAJUE114514 859 72 21ms 15 Aug 2025 886th snoozingnewt 🇨🇦 859 72 25ms 6 Dec 2025 886th JOrE20 🇺🇸 859 72 18ms 10 days ago 905th aditsu 859 77 2,303ms 23 Nov 2025 906th Shanethegamer 🇺🇸 858 83 1,374ms 4 May 2022 907th yeminghan2021 858 99 54ms 3 Feb 2025 908th frankgraziano 858 198 108ms 14 Oct 2025 909th henrydukepickle 857 97 122ms 8 Jul 2025 910th SirBogman 🇺🇸 856 55 38ms 5 May 2022 910th olivermrose 🇺🇸 856 55 42ms 6 May 2022 910th 4hg 🇺🇸 856 55 51ms 24 Aug 2022 910th DialFrost 🇸🇬 856 55 43ms 1 Jan 2023 910th error256 856 55 40ms 4 May 2024 915th JayXon 🇺🇸 856 56 1,287ms 9 May 2022 916th mtirado1 856 74 79ms 24 Dec 2022 916th Betuaredead 856 74 81ms 6 Jan 2023 916th KatieLG 🇬🇧 856 74 81ms 15 Jan 2023 916th bwat2 856 74 82ms 31 Mar 2023 916th stackotter 856 74 78ms 29 May 2023 916th ovs-code 🇩🇪 856 74 82ms 17 Apr 2024 916th madeforlosers 856 74 80ms 21 Nov 2024 923rd eshilo-draper 856 91 396ms 4 Sep 2022 923rd ericlangedijk 🇸🇮 856 91 428ms 23 May 2023 923rd KatieLG 🇬🇧 856 91 419ms 30 Apr 2024 923rd Mikey-Beep 🇬🇧 856 91 388ms 3 Sep 2024 927th DialFrost 🇸🇬 855 61 889ms 21 Jan 2024 928th Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 929th ovs-code 🇩🇪 853 62 147ms 3 Aug 2024 929th MeWhenI 🇻🇦 853 62 143ms 25 Oct 2024 929th Shanethegamer 🇺🇸 853 62 137ms 19 Dec 2024 932nd Shanethegamer 🇺🇸 853 85 451ms 18 May 2022 932nd GrayJoKing 🇦🇺 853 85 448ms 20 May 2022 934th JRaspass 🇬🇧 852 46 336ms 4 May 2022 934th Natanaelel 🇸🇪 852 46 336ms 4 May 2022 936th retrohun 852 64 6ms 6 Nov 2022 936th Re-Adventures 🇮🇳 852 64 5ms 7 Nov 2022 936th stellartux 852 64 5ms 26 Dec 2023 936th bac0id 852 64 5ms 29 Jun 2024 936th snoozingnewt 🇨🇦 852 64 5ms 1 Sep 2024 936th albanian-laundromat 852 64 5ms 22 Sep 2025 942nd the-zammers 852 68 172ms 2 Oct 2023 943rd lynn 852 96 29ms 11 Jul 2023 944th janAkali 🇷🇺 851 77 123ms 12 Feb 2025 945th Schmitt-Very-Cool 851 98 434ms 26 Sep 2025 946th inventshah 850 74 2ms 4 May 2022 946th undersquire 850 74 2ms 24 Jun 2023 946th rdmsr 850 74 2ms 24 Jun 2023 946th Bmrl7 850 74 2ms 9 Jul 2023 946th Vinterion 850 74 4ms 6 Nov 2023 946th Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 952nd krcs 🇵🇱 849 53 281ms 9 May 2022 952nd ryanlanegit 849 53 312ms 19 Jun 2022 952nd sisyphus-ppcg 🇦🇺 849 53 453ms 15 Aug 2022 955th randolchance 849 63 11ms 8 Jan 2023 955th CatsAreFluffy 849 63 12ms 18 Feb 2023 955th amiralitaheri 849 63 14ms 23 Feb 2023 955th RuyiLi 849 63 11ms 1 Apr 2023 955th TaserTheFox 🇺🇸 849 63 10ms 25 May 2023 955th pfysches-boop 849 63 10ms 6 Aug 2023 First Prev 881–960 of 3,574 Next Last