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 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 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 ArkScript 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 ArkScript 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 Calendar 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 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 875th NoahBolohan 🇨🇦 859 72 21ms 28 Feb 2023 875th neel11235813 859 72 21ms 8 Mar 2023 875th Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 875th Fracture17 859 72 20ms 8 Apr 2023 875th ayushdewan 859 72 23ms 7 May 2023 875th PeterTillema 🇳🇱 859 72 24ms 17 Oct 2023 875th Glinte 859 72 24ms 11 Dec 2023 875th nanatsu8 859 72 24ms 11 May 2024 875th thej10n 859 72 18ms 12 Jun 2024 875th tobeannouncd 859 72 16ms 25 Apr 2025 875th YAJUE114514 859 72 16ms 15 Aug 2025 875th snoozingnewt 🇨🇦 859 72 23ms 6 Dec 2025 893rd aditsu 859 77 2,388ms 23 Nov 2025 894th Yewzir 🇧🇪 858 65 4ms 9 Oct 2023 894th MeWhenI 🇻🇦 858 65 3ms 10 Oct 2023 896th Shanethegamer 🇺🇸 858 83 1,374ms 4 May 2022 897th dokutan 858 93 428ms 27 Sep 2025 898th frankgraziano 858 198 108ms 14 Oct 2025 899th henrydukepickle 857 97 125ms 8 Jul 2025 900th yeminghan2021 857 99 54ms 3 Feb 2025 901st SirBogman 🇺🇸 856 55 38ms 5 May 2022 901st olivermrose 🇺🇸 856 55 42ms 6 May 2022 901st 4hg 🇺🇸 856 55 51ms 24 Aug 2022 901st DialFrost 🇸🇬 856 55 43ms 1 Jan 2023 901st error256 856 55 40ms 4 May 2024 906th JayXon 🇺🇸 856 56 1,287ms 9 May 2022 907th mtirado1 856 74 79ms 24 Dec 2022 907th Betuaredead 856 74 81ms 6 Jan 2023 907th KatieLG 🇬🇧 856 74 81ms 15 Jan 2023 907th bwat2 856 74 82ms 31 Mar 2023 907th stackotter 856 74 78ms 29 May 2023 907th ovs-code 🇩🇪 856 74 82ms 17 Apr 2024 907th madeforlosers 856 74 80ms 21 Nov 2024 914th eshilo-draper 856 91 396ms 4 Sep 2022 914th ericlangedijk 🇸🇮 856 91 428ms 23 May 2023 914th KatieLG 🇬🇧 856 91 419ms 30 Apr 2024 914th Mikey-Beep 🇬🇧 856 91 388ms 3 Sep 2024 918th DialFrost 🇸🇬 855 61 414ms 21 Jan 2024 919th Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 920th ovs-code 🇩🇪 853 62 147ms 3 Aug 2024 920th MeWhenI 🇻🇦 853 62 143ms 25 Oct 2024 920th Shanethegamer 🇺🇸 853 62 137ms 19 Dec 2024 923rd Shanethegamer 🇺🇸 853 85 451ms 18 May 2022 923rd GrayJoKing 🇦🇺 853 85 448ms 20 May 2022 925th JRaspass 🇬🇧 852 46 349ms 4 May 2022 925th Natanaelel 🇸🇪 852 46 371ms 4 May 2022 927th retrohun 852 64 6ms 6 Nov 2022 927th Re-Adventures 🇮🇳 852 64 5ms 7 Nov 2022 927th stellartux 852 64 5ms 26 Dec 2023 927th bac0id 852 64 5ms 29 Jun 2024 927th snoozingnewt 🇨🇦 852 64 5ms 1 Sep 2024 927th albanian-laundromat 852 64 5ms 22 Sep 2025 933rd the-zammers 852 68 172ms 2 Oct 2023 934th janAkali 🇷🇺 851 77 123ms 12 Feb 2025 935th frosster 851 80 10ms 25 Dec 2025 936th lynn 851 96 29ms 11 Jul 2023 937th Schmitt-Very-Cool 851 98 435ms 26 Sep 2025 938th inventshah 850 74 2ms 4 May 2022 938th undersquire 850 74 2ms 24 Jun 2023 938th rdmsr 850 74 2ms 24 Jun 2023 938th Bmrl7 850 74 2ms 9 Jul 2023 938th Vinterion 850 74 4ms 6 Nov 2023 938th Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 944th krcs 🇵🇱 849 53 281ms 9 May 2022 944th ryanlanegit 849 53 312ms 19 Jun 2022 944th sisyphus-ppcg 🇦🇺 849 53 453ms 15 Aug 2022 947th randolchance 849 63 12ms 8 Jan 2023 947th CatsAreFluffy 849 63 11ms 18 Feb 2023 947th amiralitaheri 849 63 11ms 23 Feb 2023 947th RuyiLi 849 63 10ms 1 Apr 2023 947th TaserTheFox 🇺🇸 849 63 11ms 25 May 2023 947th pfysches-boop 849 63 12ms 6 Aug 2023 947th mhgockel 849 63 11ms 19 Aug 2023 947th NickTheEASDude 🇺🇸 849 63 11ms 18 Jan 2024 947th 823126 849 63 11ms 14 Nov 2024 947th Palladium02 849 63 11ms 12 May 2025 947th 4very 849 63 10ms 10 Jun 2025 947th Ultra814 849 63 11ms 21 Aug 2025 959th MeWhenI 🇻🇦 849 71 106ms 13 Dec 2022 960th DialFrost 🇸🇬 848 66 93ms 7 Apr 2025 First Prev 881–960 of 3,537 Next Last