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 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 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 ArkScript 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 ArkScript 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 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 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 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 871st ayushdewan 859 72 23ms 7 May 2023 871st PeterTillema 🇳🇱 859 72 24ms 17 Oct 2023 871st Glinte 859 72 24ms 11 Dec 2023 871st nanatsu8 859 72 24ms 11 May 2024 871st thej10n 859 72 18ms 12 Jun 2024 871st tobeannouncd 859 72 16ms 25 Apr 2025 871st YAJUE114514 859 72 16ms 15 Aug 2025 871st snoozingnewt 🇨🇦 859 72 23ms 6 Dec 2025 889th aditsu 859 77 3,141ms 23 Nov 2025 890th Yewzir 🇧🇪 858 65 4ms 9 Oct 2023 890th MeWhenI 🇻🇦 858 65 3ms 10 Oct 2023 892nd Shanethegamer 🇺🇸 858 83 1,354ms 4 May 2022 893rd frankgraziano 858 198 108ms 14 Oct 2025 894th dokutan 857 93 428ms 27 Sep 2025 895th henrydukepickle 857 97 118ms 8 Jul 2025 896th yeminghan2021 857 99 66ms 3 Feb 2025 897th DialFrost 🇸🇬 857 162 1,753ms 13 Sep 2025 898th SirBogman 🇺🇸 856 55 41ms 5 May 2022 898th olivermrose 🇺🇸 856 55 45ms 6 May 2022 898th 4hg 🇺🇸 856 55 42ms 24 Aug 2022 898th DialFrost 🇸🇬 856 55 44ms 1 Jan 2023 898th error256 856 55 40ms 4 May 2024 903rd JayXon 🇺🇸 856 56 998ms 9 May 2022 904th mtirado1 856 74 83ms 24 Dec 2022 904th Betuaredead 856 74 81ms 6 Jan 2023 904th KatieLG 🇬🇧 856 74 81ms 15 Jan 2023 904th bwat2 856 74 84ms 31 Mar 2023 904th stackotter 856 74 82ms 29 May 2023 904th ovs-code 🇩🇪 856 74 82ms 17 Apr 2024 904th madeforlosers 856 74 80ms 21 Nov 2024 911th eshilo-draper 856 91 365ms 4 Sep 2022 911th ericlangedijk 🇸🇮 856 91 389ms 23 May 2023 911th KatieLG 🇬🇧 856 91 363ms 30 Apr 2024 911th Mikey-Beep 🇬🇧 856 91 341ms 3 Sep 2024 915th DialFrost 🇸🇬 855 61 441ms 21 Jan 2024 916th Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 917th ovs-code 🇩🇪 853 62 131ms 3 Aug 2024 917th MeWhenI 🇻🇦 853 62 134ms 25 Oct 2024 917th Shanethegamer 🇺🇸 853 62 141ms 19 Dec 2024 920th Shanethegamer 🇺🇸 853 85 411ms 18 May 2022 920th GrayJoKing 🇦🇺 853 85 404ms 20 May 2022 922nd JRaspass 🇬🇧 852 46 349ms 4 May 2022 922nd Natanaelel 🇸🇪 852 46 371ms 4 May 2022 924th retrohun 852 64 6ms 6 Nov 2022 924th Re-Adventures 🇮🇳 852 64 5ms 7 Nov 2022 924th stellartux 852 64 5ms 26 Dec 2023 924th bac0id 852 64 5ms 29 Jun 2024 924th snoozingnewt 🇨🇦 852 64 5ms 1 Sep 2024 924th albanian-laundromat 852 64 5ms 22 Sep 2025 930th the-zammers 852 68 172ms 2 Oct 2023 931st janAkali 🇷🇺 851 77 123ms 12 Feb 2025 932nd lynn 851 96 29ms 11 Jul 2023 933rd Schmitt-Very-Cool 851 98 435ms 26 Sep 2025 934th inventshah 850 74 2ms 4 May 2022 934th undersquire 850 74 2ms 24 Jun 2023 934th rdmsr 850 74 2ms 24 Jun 2023 934th Bmrl7 850 74 2ms 9 Jul 2023 934th Vinterion 850 74 4ms 6 Nov 2023 934th Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 940th krcs 🇵🇱 849 53 282ms 9 May 2022 940th ryanlanegit 849 53 260ms 19 Jun 2022 940th sisyphus-ppcg 🇦🇺 849 53 402ms 15 Aug 2022 943rd randolchance 849 63 12ms 8 Jan 2023 943rd CatsAreFluffy 849 63 12ms 18 Feb 2023 943rd amiralitaheri 849 63 11ms 23 Feb 2023 943rd RuyiLi 849 63 10ms 1 Apr 2023 943rd TaserTheFox 🇺🇸 849 63 13ms 25 May 2023 943rd pfysches-boop 849 63 12ms 6 Aug 2023 943rd mhgockel 849 63 11ms 19 Aug 2023 943rd NickTheEASDude 🇺🇸 849 63 11ms 18 Jan 2024 943rd 823126 849 63 11ms 14 Nov 2024 943rd Palladium02 849 63 11ms 12 May 2025 943rd 4very 849 63 14ms 10 Jun 2025 943rd Ultra814 849 63 11ms 21 Aug 2025 955th MeWhenI 🇻🇦 849 71 106ms 13 Dec 2022 956th frosster 849 80 11ms 14 days ago 957th DialFrost 🇸🇬 848 66 85ms 7 Apr 2025 957th KasperKivimaeki 🇫🇮 848 66 8ms 17 days ago 959th SirBogman 🇺🇸 848 89 38ms 4 May 2022 960th Shanethegamer 🇺🇸 848 98 119ms 26 Oct 2022 First Prev 881–960 of 3,522 Next Last