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 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 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 881st Setvizan 863 62 13ms 12 Jan 2023 881st GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 881st arctouch-cristiannevianna 863 62 12ms 3 Apr 2023 881st Corxldyphik 863 62 10ms 11 Apr 2023 881st Blockyheadman 863 62 10ms 1 Nov 2023 881st ollyspooner 863 62 11ms 22 Nov 2023 881st itserasmus 863 62 11ms 25 Jan 2024 881st Jacob385 863 62 10ms 13 Mar 2024 881st junkondo-jp 863 62 11ms 30 Jun 2024 881st ShiraJoseph 🇺🇸 863 62 11ms 1 Mar 2025 881st tomh1012 863 62 12ms 3 Dec 2025 892nd MeWhenI 🇻🇦 863 145 1,417ms 28 Mar 2025 893rd Shanethegamer 🇺🇸 862 70 104ms 12 Dec 2022 893rd Alessandro-Balconi 🇮🇹 862 70 103ms 26 Dec 2022 895th NewDefectus 🇮🇱 862 73 3ms 6 May 2022 895th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 895th LorenzoDeGaspari 862 73 2ms 27 May 2024 895th Bpc-CPU 862 73 2ms 12 Jul 2025 895th AZTECCO 862 73 2ms 16 Sep 2025 895th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 895th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 895th albanian-laundromat 862 73 3ms 20 Jan 2026 903rd 386asm 🇺🇸 862 86 40ms 9 Apr 2023 903rd DialFrost 🇸🇬 862 86 43ms 30 Dec 2025 905th o0lit3 🇺🇸 860 54 7ms 22 Jun 2023 905th Natanaelel 🇸🇪 860 54 11ms 10 Feb 2025 907th aditsu 860 77 2,622ms 23 Nov 2025 908th Liibe 860 97 477ms 25 Sep 2025 909th stefangimmillaro 860 112 310ms 26 Sep 2023 909th kkoenig 860 112 290ms 4 Jan 2024 911th frankgraziano 860 198 108ms 14 Oct 2025 912th Yewzir 🇧🇪 859 65 4ms 9 Oct 2023 912th MeWhenI 🇻🇦 859 65 4ms 10 Oct 2023 914th scpchicken 🇵🇼 859 72 20ms 4 May 2022 914th sultan 859 72 17ms 6 Jun 2022 914th annaproxy 859 72 22ms 22 Aug 2022 914th BlankSpruce 859 72 24ms 9 Sep 2022 914th ValentinCassayre 859 72 21ms 8 Oct 2022 914th mathb0y512 859 72 22ms 1 Dec 2022 914th NoahBolohan 🇨🇦 859 72 23ms 28 Feb 2023 914th neel11235813 859 72 22ms 8 Mar 2023 914th Kacarott 🇦🇺 859 72 17ms 24 Mar 2023 914th Fracture17 859 72 19ms 8 Apr 2023 914th ayushdewan 859 72 25ms 7 May 2023 914th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 914th Glinte 859 72 24ms 11 Dec 2023 914th nanatsu8 859 72 26ms 11 May 2024 914th thej10n 859 72 20ms 12 Jun 2024 914th tobeannouncd 859 72 18ms 25 Apr 2025 914th YAJUE114514 859 72 17ms 15 Aug 2025 914th madex 🇩🇪 859 72 23ms 17 days ago 932nd Shanethegamer 🇺🇸 858 83 1,252ms 4 May 2022 933rd henrydukepickle 858 97 125ms 8 Jul 2025 934th yeminghan2021 858 99 58ms 3 Feb 2025 935th JayXon 🇺🇸 857 56 1,287ms 9 May 2022 936th eshilo-draper 857 91 358ms 4 Sep 2022 936th ericlangedijk 🇸🇮 857 91 369ms 23 May 2023 936th KatieLG 🇬🇧 857 91 377ms 30 Apr 2024 936th Mikey-Beep 🇬🇧 857 91 365ms 3 Sep 2024 940th SirBogman 🇺🇸 856 55 42ms 5 May 2022 940th olivermrose 🇺🇸 856 55 40ms 6 May 2022 940th 4hg 🇺🇸 856 55 40ms 24 Aug 2022 940th DialFrost 🇸🇬 856 55 39ms 1 Jan 2023 940th error256 856 55 42ms 4 May 2024 945th DialFrost 🇸🇬 856 61 439ms 21 Jan 2024 946th mtirado1 856 74 91ms 24 Dec 2022 946th Betuaredead 856 74 95ms 6 Jan 2023 946th KatieLG 🇬🇧 856 74 91ms 15 Jan 2023 946th bwat2 856 74 88ms 31 Mar 2023 946th stackotter 856 74 90ms 29 May 2023 946th ovs-code 🇩🇪 856 74 85ms 17 Apr 2024 952nd Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 953rd ovs-code 🇩🇪 854 85 14ms 11 Dec 2023 954th ovs-code 🇩🇪 853 62 152ms 3 Aug 2024 954th MeWhenI 🇻🇦 853 62 144ms 25 Oct 2024 954th Shanethegamer 🇺🇸 853 62 156ms 19 Dec 2024 957th Shanethegamer 🇺🇸 853 85 429ms 18 May 2022 957th GrayJoKing 🇦🇺 853 85 407ms 20 May 2022 959th JRaspass 🇬🇧 852 46 416ms 4 May 2022 959th Natanaelel 🇸🇪 852 46 422ms 4 May 2022 First Prev 881–960 of 3,655 Next Last