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 821st cuzdav 865 98 53ms 4 May 2025 821st timhaj 🇸🇮 865 98 56ms 12 Sep 2025 821st Yax42 🇫🇷 865 98 51ms 4 Oct 2025 829th DialFrost 🇸🇬 864 86 19ms 15 Dec 2024 830th Setvizan 863 62 10ms 12 Jan 2023 830th GreenBeansAgainstVeganism 863 62 9ms 13 Jan 2023 830th arctouch-cristiannevianna 863 62 10ms 3 Apr 2023 830th Corxldyphik 863 62 9ms 11 Apr 2023 830th Blockyheadman 863 62 9ms 1 Nov 2023 830th ollyspooner 863 62 10ms 22 Nov 2023 830th itserasmus 863 62 10ms 25 Jan 2024 830th Jacob385 863 62 11ms 13 Mar 2024 830th junkondo-jp 863 62 10ms 30 Jun 2024 830th ShiraJoseph 🇺🇸 863 62 10ms 1 Mar 2025 830th tomh1012 863 62 13ms 6 hours ago 841st MeWhenI 🇻🇦 863 145 470ms 28 Mar 2025 842nd HPWiz 🇳🇿 862 50 241ms 4 May 2022 842nd JayXon 🇺🇸 862 50 251ms 5 May 2022 842nd Steffan153 🇫🇮 862 50 236ms 10 Dec 2022 842nd ovs-code 🇩🇪 862 50 389ms 24 Oct 2023 842nd sean-niemann 🇺🇸 862 50 246ms 12 Jul 2024 847th typeswitch-dev 🇵🇹 862 75 5ms 22 Jul 2023 848th ovs-code 🇩🇪 862 161 1,597ms 14 Sep 2025 848th Yewzir 🇧🇪 862 161 1,672ms 19 days ago 850th Shanethegamer 🇺🇸 861 58 790ms 17 Sep 2025 851st NewDefectus 🇮🇱 861 73 3ms 6 May 2022 851st Natanaelel 🇸🇪 861 73 2ms 15 Jun 2022 851st LorenzoDeGaspari 861 73 3ms 27 May 2024 851st Bpc-CPU 861 73 2ms 12 Jul 2025 851st AZTECCO 861 73 3ms 16 Sep 2025 851st CaedenHarper 🇨🇦 861 73 3ms 28 Sep 2025 851st prestosilver 🇺🇸 861 73 3ms 105 mins ago 858th 386asm 🇺🇸 861 86 45ms 9 Apr 2023 859th albanian-laundromat 861 113 255ms 15 hours ago 860th o0lit3 🇺🇸 859 54 8ms 22 Jun 2023 860th Natanaelel 🇸🇪 859 54 8ms 10 Feb 2025 862nd scpchicken 🇵🇼 859 72 19ms 4 May 2022 862nd sultan 859 72 18ms 6 Jun 2022 862nd annaproxy 859 72 21ms 22 Aug 2022 862nd BlankSpruce 859 72 24ms 9 Sep 2022 862nd ValentinCassayre 859 72 19ms 8 Oct 2022 862nd mathb0y512 859 72 21ms 1 Dec 2022 862nd NoahBolohan 🇨🇦 859 72 23ms 28 Feb 2023 862nd neel11235813 859 72 22ms 8 Mar 2023 862nd Kacarott 🇦🇺 859 72 15ms 24 Mar 2023 862nd Fracture17 859 72 19ms 8 Apr 2023 862nd ayushdewan 859 72 24ms 7 May 2023 862nd PeterTillema 🇳🇱 859 72 24ms 17 Oct 2023 862nd Glinte 859 72 23ms 11 Dec 2023 862nd nanatsu8 859 72 23ms 11 May 2024 862nd thej10n 859 72 20ms 12 Jun 2024 862nd duckyluuk 🇳🇱 859 72 19ms 13 Jun 2024 862nd tobeannouncd 859 72 16ms 25 Apr 2025 862nd YAJUE114514 859 72 16ms 15 Aug 2025 880th aditsu 859 77 2,042ms 10 days ago 881st Liibe 859 97 334ms 25 Sep 2025 882nd Yewzir 🇧🇪 858 65 4ms 9 Oct 2023 882nd MeWhenI 🇻🇦 858 65 3ms 10 Oct 2023 884th Shanethegamer 🇺🇸 858 83 1,291ms 4 May 2022 885th frankgraziano 858 198 101ms 14 Oct 2025 886th dokutan 857 93 428ms 27 Sep 2025 887th henrydukepickle 857 97 124ms 8 Jul 2025 888th yeminghan2021 857 99 54ms 3 Feb 2025 889th DialFrost 🇸🇬 857 162 1,719ms 13 Sep 2025 889th emgordon154 857 162 1,676ms 17 Sep 2025 891st SirBogman 🇺🇸 856 55 43ms 5 May 2022 891st olivermrose 🇺🇸 856 55 45ms 6 May 2022 891st 4hg 🇺🇸 856 55 46ms 24 Aug 2022 891st DialFrost 🇸🇬 856 55 50ms 1 Jan 2023 891st error256 856 55 43ms 4 May 2024 896th JayXon 🇺🇸 856 56 998ms 9 May 2022 897th mtirado1 856 74 73ms 24 Dec 2022 897th Betuaredead 856 74 77ms 6 Jan 2023 897th KatieLG 🇬🇧 856 74 78ms 15 Jan 2023 897th bwat2 856 74 78ms 31 Mar 2023 First Prev 826–900 of 3,506 Next Last