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 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 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 823rd oceko 865 98 56ms 19 Feb 2024 823rd dokutan 865 98 56ms 17 Mar 2024 823rd cuzdav 865 98 57ms 4 May 2025 823rd timhaj 🇸🇮 865 98 53ms 12 Sep 2025 823rd Yax42 🇫🇷 865 98 55ms 4 Oct 2025 831st DialFrost 🇸🇬 864 86 19ms 15 Dec 2024 832nd Setvizan 863 62 10ms 12 Jan 2023 832nd GreenBeansAgainstVeganism 863 62 10ms 13 Jan 2023 832nd arctouch-cristiannevianna 863 62 10ms 3 Apr 2023 832nd Corxldyphik 863 62 10ms 11 Apr 2023 832nd Blockyheadman 863 62 10ms 1 Nov 2023 832nd ollyspooner 863 62 10ms 22 Nov 2023 832nd itserasmus 863 62 10ms 25 Jan 2024 832nd Jacob385 863 62 10ms 13 Mar 2024 832nd junkondo-jp 863 62 11ms 30 Jun 2024 832nd ShiraJoseph 🇺🇸 863 62 9ms 1 Mar 2025 832nd tomh1012 863 62 10ms 31 hours ago 843rd MeWhenI 🇻🇦 863 145 470ms 28 Mar 2025 844th HPWiz 🇳🇿 862 50 241ms 4 May 2022 844th JayXon 🇺🇸 862 50 251ms 5 May 2022 844th Steffan153 🇫🇮 862 50 236ms 10 Dec 2022 844th ovs-code 🇩🇪 862 50 389ms 24 Oct 2023 844th sean-niemann 🇺🇸 862 50 246ms 12 Jul 2024 849th typeswitch-dev 🇵🇹 862 75 5ms 22 Jul 2023 850th ovs-code 🇩🇪 862 161 1,597ms 14 Sep 2025 850th Yewzir 🇧🇪 862 161 1,672ms 20 days ago 852nd Shanethegamer 🇺🇸 861 58 790ms 17 Sep 2025 853rd NewDefectus 🇮🇱 861 73 3ms 6 May 2022 853rd Natanaelel 🇸🇪 861 73 2ms 15 Jun 2022 853rd LorenzoDeGaspari 861 73 3ms 27 May 2024 853rd Bpc-CPU 861 73 2ms 12 Jul 2025 853rd AZTECCO 861 73 3ms 16 Sep 2025 853rd CaedenHarper 🇨🇦 861 73 3ms 28 Sep 2025 853rd prestosilver 🇺🇸 861 73 3ms 26 hours ago 860th 386asm 🇺🇸 861 86 45ms 9 Apr 2023 861st albanian-laundromat 861 113 255ms 39 hours ago 862nd o0lit3 🇺🇸 859 54 8ms 22 Jun 2023 862nd Natanaelel 🇸🇪 859 54 8ms 10 Feb 2025 864th scpchicken 🇵🇼 859 72 19ms 4 May 2022 864th sultan 859 72 18ms 6 Jun 2022 864th annaproxy 859 72 21ms 22 Aug 2022 864th BlankSpruce 859 72 24ms 9 Sep 2022 864th ValentinCassayre 859 72 19ms 8 Oct 2022 864th mathb0y512 859 72 21ms 1 Dec 2022 864th NoahBolohan 🇨🇦 859 72 23ms 28 Feb 2023 864th neel11235813 859 72 22ms 8 Mar 2023 864th Kacarott 🇦🇺 859 72 15ms 24 Mar 2023 864th Fracture17 859 72 19ms 8 Apr 2023 864th ayushdewan 859 72 24ms 7 May 2023 864th PeterTillema 🇳🇱 859 72 24ms 17 Oct 2023 864th Glinte 859 72 23ms 11 Dec 2023 864th nanatsu8 859 72 23ms 11 May 2024 864th thej10n 859 72 20ms 12 Jun 2024 864th tobeannouncd 859 72 16ms 25 Apr 2025 864th YAJUE114514 859 72 16ms 15 Aug 2025 881st aditsu 859 77 2,042ms 11 days ago 882nd Liibe 859 97 334ms 25 Sep 2025 883rd Yewzir 🇧🇪 858 65 4ms 9 Oct 2023 883rd MeWhenI 🇻🇦 858 65 3ms 10 Oct 2023 885th Shanethegamer 🇺🇸 858 83 1,291ms 4 May 2022 886th frankgraziano 858 198 101ms 14 Oct 2025 887th dokutan 857 93 428ms 27 Sep 2025 888th henrydukepickle 857 97 124ms 8 Jul 2025 889th yeminghan2021 857 99 56ms 3 Feb 2025 890th DialFrost 🇸🇬 857 162 1,719ms 13 Sep 2025 890th emgordon154 857 162 1,676ms 17 Sep 2025 892nd SirBogman 🇺🇸 856 55 43ms 5 May 2022 892nd olivermrose 🇺🇸 856 55 45ms 6 May 2022 892nd 4hg 🇺🇸 856 55 46ms 24 Aug 2022 892nd DialFrost 🇸🇬 856 55 50ms 1 Jan 2023 892nd error256 856 55 43ms 4 May 2024 897th JayXon 🇺🇸 856 56 998ms 9 May 2022 898th mtirado1 856 74 73ms 24 Dec 2022 898th Betuaredead 856 74 77ms 6 Jan 2023 898th KatieLG 🇬🇧 856 74 78ms 15 Jan 2023 First Prev 826–900 of 3,508 Next Last