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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL 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 ><> ALGOL 68 ArkScript 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 APL 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 880th deadp4nda 🇩🇪 866 90 412ms 26 Apr 2024 880th 123mjb 866 90 422ms 23 Jun 2025 880th michelebastione 🇮🇹 866 90 420ms 24 Aug 2025 880th razvandmtr 🇷🇴 866 90 527ms 6 Nov 2025 885th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 886th dokutan 865 79 10ms 27 Apr 2024 886th SwordF-Official 🇺🇸 865 79 10ms 1 Feb 2026 888th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 889th DialFrost 🇸🇬 865 84 17ms 1 Jan 2026 890th MeWhenI 🇻🇦 865 145 1,217ms 28 Mar 2025 891st 386asm 🇺🇸 864 86 40ms 9 Apr 2023 891st DialFrost 🇸🇬 864 86 43ms 30 Dec 2025 893rd HPWiz 🇳🇿 863 50 239ms 4 May 2022 893rd JayXon 🇺🇸 863 50 246ms 5 May 2022 893rd Steffan153 🇫🇮 863 50 261ms 10 Dec 2022 893rd ovs-code 🇩🇪 863 50 426ms 24 Oct 2023 893rd sean-niemann 🇺🇸 863 50 280ms 12 Jul 2024 898th Setvizan 863 62 11ms 12 Jan 2023 898th GreenBeansAgainstVeganism 863 62 13ms 13 Jan 2023 898th arctouch-cristiannevianna 863 62 12ms 3 Apr 2023 898th Corxldyphik 863 62 11ms 11 Apr 2023 898th Blockyheadman 863 62 15ms 1 Nov 2023 898th ollyspooner 863 62 11ms 22 Nov 2023 898th itserasmus 863 62 13ms 25 Jan 2024 898th Jacob385 863 62 11ms 13 Mar 2024 898th junkondo-jp 863 62 12ms 30 Jun 2024 898th ShiraJoseph 🇺🇸 863 62 11ms 1 Mar 2025 898th tomh1012 863 62 11ms 3 Dec 2025 898th scpchicken 🇵🇼 863 62 11ms 39 hours ago 910th Shanethegamer 🇺🇸 863 70 104ms 12 Dec 2022 910th Alessandro-Balconi 🇮🇹 863 70 102ms 26 Dec 2022 912th emgordon154 863 160 1,737ms 24 Dec 2025 912th DialFrost 🇸🇬 863 160 1,683ms 17 Jan 2026 914th NewDefectus 🇮🇱 862 73 2ms 6 May 2022 914th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 914th LorenzoDeGaspari 862 73 2ms 27 May 2024 914th Bpc-CPU 862 73 2ms 12 Jul 2025 914th AZTECCO 862 73 2ms 16 Sep 2025 914th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 914th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 914th albanian-laundromat 🇺🇸 862 73 3ms 20 Jan 2026 914th madex 🇩🇪 862 73 2ms 13 days ago 923rd aditsu 862 77 2,521ms 23 Nov 2025 924th frankgraziano 862 198 108ms 14 Oct 2025 925th o0lit3 🇺🇸 861 54 7ms 22 Jun 2023 925th Natanaelel 🇸🇪 861 54 7ms 10 Feb 2025 927th stefangimmillaro 861 112 341ms 26 Sep 2023 927th kkoenig 861 112 319ms 4 Jan 2024 929th Yewzir 🇧🇪 860 65 4ms 9 Oct 2023 929th MeWhenI 🇻🇦 860 65 4ms 10 Oct 2023 931st Liibe 860 97 471ms 25 Sep 2025 932nd sultan 859 72 24ms 6 Jun 2022 932nd annaproxy 859 72 24ms 22 Aug 2022 932nd BlankSpruce 859 72 24ms 9 Sep 2022 932nd ValentinCassayre 859 72 21ms 8 Oct 2022 932nd mathb0y512 859 72 24ms 1 Dec 2022 932nd NoahBolohan 🇨🇦 859 72 24ms 28 Feb 2023 932nd neel11235813 859 72 23ms 8 Mar 2023 932nd Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 932nd Fracture17 859 72 20ms 8 Apr 2023 932nd ayushdewan 859 72 24ms 7 May 2023 932nd PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 932nd Glinte 859 72 25ms 11 Dec 2023 932nd nanatsu8 859 72 25ms 11 May 2024 932nd thej10n 859 72 19ms 12 Jun 2024 932nd tobeannouncd 859 72 19ms 25 Apr 2025 932nd YAJUE114514 859 72 17ms 15 Aug 2025 932nd madex 🇩🇪 859 72 25ms 15 Mar 2026 932nd solisolu 859 72 19ms 12 days ago 950th DialFrost 🇸🇬 859 86 1,476ms 10 Mar 2025 951st henrydukepickle 858 97 132ms 8 Jul 2025 952nd yeminghan2021 858 99 57ms 3 Feb 2025 953rd SirBogman 🇺🇸 857 55 39ms 5 May 2022 953rd olivermrose 🇺🇸 857 55 43ms 6 May 2022 953rd 4hg 🇺🇸 857 55 45ms 24 Aug 2022 953rd DialFrost 🇸🇬 857 55 45ms 1 Jan 2023 953rd error256 857 55 43ms 4 May 2024 958th JayXon 🇺🇸 857 56 1,322ms 9 May 2022 959th eshilo-draper 857 91 425ms 4 Sep 2022 959th ericlangedijk 🇸🇮 857 91 437ms 23 May 2023 First Prev 881–960 of 3,775 Next Last