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 822nd razvandmtr 🇷🇴 865 90 385ms 6 Nov 2025 827th shellbertt 🇨🇦 865 98 56ms 9 May 2022 827th iakolzin 865 98 55ms 26 May 2022 827th Betuaredead 865 98 55ms 5 Jan 2023 827th oceko 865 98 55ms 19 Feb 2024 827th dokutan 865 98 55ms 17 Mar 2024 827th cuzdav 865 98 54ms 4 May 2025 827th timhaj 🇸🇮 865 98 57ms 12 Sep 2025 827th Yax42 🇫🇷 865 98 57ms 4 Oct 2025 835th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 836th DialFrost 🇸🇬 864 86 18ms 15 Dec 2024 837th Setvizan 863 62 10ms 12 Jan 2023 837th GreenBeansAgainstVeganism 863 62 10ms 13 Jan 2023 837th arctouch-cristiannevianna 863 62 10ms 3 Apr 2023 837th Corxldyphik 863 62 10ms 11 Apr 2023 837th Blockyheadman 863 62 10ms 1 Nov 2023 837th ollyspooner 863 62 10ms 22 Nov 2023 837th itserasmus 863 62 10ms 25 Jan 2024 837th Jacob385 863 62 10ms 13 Mar 2024 837th junkondo-jp 863 62 11ms 30 Jun 2024 837th ShiraJoseph 🇺🇸 863 62 9ms 1 Mar 2025 837th tomh1012 863 62 9ms 12 days ago 848th MeWhenI 🇻🇦 863 145 526ms 28 Mar 2025 849th HPWiz 🇳🇿 862 50 241ms 4 May 2022 849th JayXon 🇺🇸 862 50 225ms 5 May 2022 849th Steffan153 🇫🇮 862 50 236ms 10 Dec 2022 849th ovs-code 🇩🇪 862 50 389ms 24 Oct 2023 849th sean-niemann 🇺🇸 862 50 231ms 12 Jul 2024 854th 386asm 🇺🇸 862 86 40ms 9 Apr 2023 855th ovs-code 🇩🇪 862 161 1,719ms 14 Sep 2025 855th Yewzir 🇧🇪 862 161 2,399ms 14 Nov 2025 857th Shanethegamer 🇺🇸 861 58 767ms 17 Sep 2025 858th NewDefectus 🇮🇱 861 73 3ms 6 May 2022 858th Natanaelel 🇸🇪 861 73 3ms 15 Jun 2022 858th LorenzoDeGaspari 861 73 2ms 27 May 2024 858th Bpc-CPU 861 73 2ms 12 Jul 2025 858th AZTECCO 861 73 2ms 16 Sep 2025 858th CaedenHarper 🇨🇦 861 73 2ms 28 Sep 2025 858th prestosilver 🇺🇸 861 73 2ms 12 days ago 865th Liibe 860 97 391ms 25 Sep 2025 866th stefangimmillaro 860 112 268ms 26 Sep 2023 866th kkoenig 860 112 287ms 4 Jan 2024 868th o0lit3 🇺🇸 859 54 7ms 22 Jun 2023 868th Natanaelel 🇸🇪 859 54 7ms 10 Feb 2025 870th scpchicken 🇵🇼 859 72 19ms 4 May 2022 870th sultan 859 72 17ms 6 Jun 2022 870th annaproxy 859 72 20ms 22 Aug 2022 870th BlankSpruce 859 72 23ms 9 Sep 2022 870th ValentinCassayre 859 72 21ms 8 Oct 2022 870th mathb0y512 859 72 21ms 1 Dec 2022 870th NoahBolohan 🇨🇦 859 72 21ms 28 Feb 2023 870th neel11235813 859 72 21ms 8 Mar 2023 870th Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 870th Fracture17 859 72 20ms 8 Apr 2023 870th ayushdewan 859 72 23ms 7 May 2023 870th PeterTillema 🇳🇱 859 72 24ms 17 Oct 2023 870th Glinte 859 72 24ms 11 Dec 2023 870th nanatsu8 859 72 24ms 11 May 2024 870th thej10n 859 72 18ms 12 Jun 2024 870th tobeannouncd 859 72 16ms 25 Apr 2025 870th YAJUE114514 859 72 16ms 15 Aug 2025 870th snoozingnewt 🇨🇦 859 72 23ms 10 days ago 888th aditsu 859 77 2,554ms 22 days ago 889th Yewzir 🇧🇪 858 65 4ms 9 Oct 2023 889th MeWhenI 🇻🇦 858 65 3ms 10 Oct 2023 891st Shanethegamer 🇺🇸 858 83 1,354ms 4 May 2022 892nd frankgraziano 858 198 113ms 14 Oct 2025 893rd dokutan 857 93 428ms 27 Sep 2025 894th henrydukepickle 857 97 118ms 8 Jul 2025 895th yeminghan2021 857 99 51ms 3 Feb 2025 896th DialFrost 🇸🇬 857 162 1,753ms 13 Sep 2025 896th emgordon154 857 162 1,669ms 17 Sep 2025 898th SirBogman 🇺🇸 856 55 38ms 5 May 2022 898th olivermrose 🇺🇸 856 55 38ms 6 May 2022 898th 4hg 🇺🇸 856 55 36ms 24 Aug 2022 First Prev 826–900 of 3,523 Next Last