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 898th bwat2 856 74 78ms 31 Mar 2023 898th stackotter 856 74 77ms 29 May 2023 898th ovs-code 🇩🇪 856 74 76ms 17 Apr 2024 898th madeforlosers 856 74 76ms 21 Nov 2024 905th frosster 856 76 7ms 12 May 2023 905th kyleclaassen 856 76 11ms 20 May 2023 905th NickTheEASDude 🇺🇸 856 76 6ms 7 May 2024 905th koipondx86 856 76 8ms 8 Nov 2024 909th eshilo-draper 856 91 317ms 4 Sep 2022 909th ericlangedijk 🇸🇮 856 91 330ms 23 May 2023 909th KatieLG 🇬🇧 856 91 333ms 30 Apr 2024 909th Mikey-Beep 🇬🇧 856 91 316ms 3 Sep 2024 913th DialFrost 🇸🇬 855 61 460ms 21 Jan 2024 914th Shanethegamer 🇺🇸 855 99 27ms 27 Apr 2023 915th ovs-code 🇩🇪 853 62 132ms 3 Aug 2024 915th MeWhenI 🇻🇦 853 62 139ms 25 Oct 2024 915th Shanethegamer 🇺🇸 853 62 135ms 19 Dec 2024 918th Shanethegamer 🇺🇸 853 85 411ms 18 May 2022 918th GrayJoKing 🇦🇺 853 85 404ms 20 May 2022 920th Grrisly 853 114 261ms 25 Mar 2024 921st JRaspass 🇬🇧 852 46 340ms 4 May 2022 921st Natanaelel 🇸🇪 852 46 322ms 4 May 2022 923rd the-zammers 852 68 188ms 2 Oct 2023 924th retrohun 851 64 6ms 6 Nov 2022 924th Re-Adventures 🇮🇳 851 64 5ms 7 Nov 2022 924th stellartux 851 64 5ms 26 Dec 2023 924th bac0id 851 64 5ms 29 Jun 2024 924th snoozingnewt 🇺🇸 851 64 6ms 1 Sep 2024 924th albanian-laundromat 851 64 5ms 22 Sep 2025 930th lynn 851 96 30ms 11 Jul 2023 931st Schmitt-Very-Cool 851 98 336ms 26 Sep 2025 932nd inventshah 850 74 4ms 4 May 2022 932nd undersquire 850 74 3ms 24 Jun 2023 932nd rdmsr 850 74 2ms 24 Jun 2023 932nd Bmrl7 850 74 3ms 9 Jul 2023 932nd Vinterion 850 74 3ms 6 Nov 2023 932nd Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 938th janAkali 🇷🇺 850 77 118ms 12 Feb 2025 939th krcs 🇵🇱 849 53 246ms 9 May 2022 939th ryanlanegit 849 53 243ms 19 Jun 2022 939th sisyphus-ppcg 🇦🇺 849 53 402ms 15 Aug 2022 942nd randolchance 849 63 10ms 8 Jan 2023 942nd CatsAreFluffy 849 63 10ms 18 Feb 2023 942nd amiralitaheri 849 63 10ms 23 Feb 2023 942nd RuyiLi 849 63 10ms 1 Apr 2023 942nd TaserTheFox 🇺🇸 849 63 10ms 25 May 2023 942nd pfysches-boop 849 63 10ms 6 Aug 2023 942nd mhgockel 849 63 10ms 19 Aug 2023 942nd NickTheEASDude 🇺🇸 849 63 10ms 18 Jan 2024 942nd 823126 849 63 11ms 14 Nov 2024 942nd Palladium02 849 63 9ms 12 May 2025 942nd 4very 849 63 10ms 10 Jun 2025 942nd Ultra814 849 63 9ms 21 Aug 2025 954th DialFrost 🇸🇬 848 66 95ms 7 Apr 2025 955th SirBogman 🇺🇸 848 89 51ms 4 May 2022 956th Shanethegamer 🇺🇸 848 98 123ms 26 Oct 2022 956th emgordon154 848 98 122ms 18 Feb 2025 958th jared-hughes 848 100 51ms 20 Jul 2022 958th ZakkkkAttackkkk 🇵🇭 848 100 54ms 10 Aug 2022 958th Walter225 848 100 52ms 25 Jul 2023 961st AdamHe17 847 73 19ms 31 May 2022 961st AliceFord 847 73 20ms 2 Jun 2022 961st Natanaelel 🇸🇪 847 73 17ms 16 Jun 2022 961st btjones0 847 73 23ms 21 Jun 2022 961st marcin7Cd 847 73 20ms 27 Jun 2022 961st tri1212 🇻🇳 847 73 19ms 18 Jul 2022 961st vhoulbreque 🇫🇷 847 73 21ms 18 Aug 2022 961st KatieLG 🇬🇧 847 73 20ms 29 Aug 2022 961st tkr-sh 🇰🇵 847 73 19ms 8 Sep 2022 961st jroscoe5 847 73 20ms 15 Sep 2022 961st fredrik-bakke 🇳🇴 847 73 20ms 18 Sep 2022 961st firegene 🇮🇪 847 73 19ms 27 Sep 2022 961st OhmNomNom 847 73 23ms 7 Oct 2022 961st 0-4849 847 73 19ms 1 Nov 2022 961st M0PKOBKA 847 73 23ms 19 Dec 2022 First Prev 901–975 of 3,508 Next Last