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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 873rd junkondo-jp 863 62 12ms 30 Jun 2024 873rd ShiraJoseph 🇺🇸 863 62 10ms 1 Mar 2025 873rd tomh1012 863 62 15ms 3 Dec 2025 884th MeWhenI 🇻🇦 863 145 1,547ms 28 Mar 2025 885th DialFrost 🇸🇬 862 56 1,180ms 1 Sep 2025 885th GolfingSuccess 🇬🇷 862 56 905ms 21 days ago 887th NewDefectus 🇮🇱 862 73 3ms 6 May 2022 887th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 887th LorenzoDeGaspari 862 73 2ms 27 May 2024 887th Bpc-CPU 862 73 2ms 12 Jul 2025 887th AZTECCO 862 73 2ms 16 Sep 2025 887th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 887th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 887th albanian-laundromat 862 73 3ms 20 Jan 2026 895th 386asm 🇺🇸 862 86 40ms 9 Apr 2023 895th DialFrost 🇸🇬 862 86 43ms 30 Dec 2025 897th Shanethegamer 🇺🇸 861 70 99ms 12 Dec 2022 897th Alessandro-Balconi 🇮🇹 861 70 95ms 26 Dec 2022 899th o0lit3 🇺🇸 860 54 8ms 22 Jun 2023 899th Natanaelel 🇸🇪 860 54 7ms 10 Feb 2025 901st Liibe 860 97 477ms 25 Sep 2025 902nd stefangimmillaro 860 112 313ms 26 Sep 2023 902nd kkoenig 860 112 290ms 4 Jan 2024 904th frankgraziano 860 198 108ms 14 Oct 2025 905th Yewzir 🇧🇪 859 65 4ms 9 Oct 2023 905th MeWhenI 🇻🇦 859 65 4ms 10 Oct 2023 907th scpchicken 🇵🇼 859 72 20ms 4 May 2022 907th sultan 859 72 17ms 6 Jun 2022 907th annaproxy 859 72 22ms 22 Aug 2022 907th BlankSpruce 859 72 24ms 9 Sep 2022 907th ValentinCassayre 859 72 21ms 8 Oct 2022 907th mathb0y512 859 72 22ms 1 Dec 2022 907th NoahBolohan 🇨🇦 859 72 23ms 28 Feb 2023 907th neel11235813 859 72 22ms 8 Mar 2023 907th Kacarott 🇦🇺 859 72 17ms 24 Mar 2023 907th Fracture17 859 72 19ms 8 Apr 2023 907th ayushdewan 859 72 25ms 7 May 2023 907th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 907th Glinte 859 72 24ms 11 Dec 2023 907th nanatsu8 859 72 26ms 11 May 2024 907th thej10n 859 72 20ms 12 Jun 2024 907th tobeannouncd 859 72 18ms 25 Apr 2025 907th YAJUE114514 859 72 17ms 15 Aug 2025 924th aditsu 859 77 2,303ms 23 Nov 2025 925th Shanethegamer 🇺🇸 858 83 1,374ms 4 May 2022 926th yeminghan2021 858 99 63ms 3 Feb 2025 927th henrydukepickle 857 97 132ms 8 Jul 2025 928th SirBogman 🇺🇸 856 55 38ms 5 May 2022 928th olivermrose 🇺🇸 856 55 42ms 6 May 2022 928th 4hg 🇺🇸 856 55 50ms 24 Aug 2022 928th DialFrost 🇸🇬 856 55 43ms 1 Jan 2023 928th error256 856 55 40ms 4 May 2024 933rd JayXon 🇺🇸 856 56 1,287ms 9 May 2022 934th mtirado1 856 74 80ms 24 Dec 2022 934th Betuaredead 856 74 78ms 6 Jan 2023 934th KatieLG 🇬🇧 856 74 92ms 15 Jan 2023 934th bwat2 856 74 80ms 31 Mar 2023 934th stackotter 856 74 84ms 29 May 2023 934th ovs-code 🇩🇪 856 74 84ms 17 Apr 2024 934th madeforlosers 856 74 82ms 21 Nov 2024 941st eshilo-draper 856 91 392ms 4 Sep 2022 941st ericlangedijk 🇸🇮 856 91 398ms 23 May 2023 941st KatieLG 🇬🇧 856 91 411ms 30 Apr 2024 941st Mikey-Beep 🇬🇧 856 91 388ms 3 Sep 2024 945th DialFrost 🇸🇬 855 61 439ms 21 Jan 2024 946th Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 947th ovs-code 🇩🇪 853 62 147ms 3 Aug 2024 947th MeWhenI 🇻🇦 853 62 144ms 25 Oct 2024 947th Shanethegamer 🇺🇸 853 62 152ms 19 Dec 2024 950th Shanethegamer 🇺🇸 853 85 479ms 18 May 2022 950th GrayJoKing 🇦🇺 853 85 407ms 20 May 2022 952nd JRaspass 🇬🇧 852 46 379ms 4 May 2022 952nd Natanaelel 🇸🇪 852 46 378ms 4 May 2022 954th retrohun 852 64 4ms 6 Nov 2022 954th Re-Adventures 🇮🇳 852 64 4ms 7 Nov 2022 954th stellartux 852 64 4ms 26 Dec 2023 954th bac0id 852 64 4ms 29 Jun 2024 954th snoozingnewt 🇨🇦 852 64 4ms 1 Sep 2024 954th albanian-laundromat 852 64 4ms 22 Sep 2025 960th the-zammers 852 68 165ms 2 Oct 2023 First Prev 881–960 of 3,619 Next Last