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 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 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 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 898th DialFrost 🇸🇬 856 55 38ms 1 Jan 2023 898th error256 856 55 36ms 4 May 2024 903rd JayXon 🇺🇸 856 56 998ms 9 May 2022 904th mtirado1 856 74 83ms 24 Dec 2022 904th Betuaredead 856 74 81ms 6 Jan 2023 904th KatieLG 🇬🇧 856 74 81ms 15 Jan 2023 904th bwat2 856 74 84ms 31 Mar 2023 904th stackotter 856 74 82ms 29 May 2023 904th ovs-code 🇩🇪 856 74 82ms 17 Apr 2024 904th madeforlosers 856 74 80ms 21 Nov 2024 911th frosster 856 76 7ms 12 May 2023 911th kyleclaassen 856 76 7ms 20 May 2023 911th NickTheEASDude 🇺🇸 856 76 6ms 7 May 2024 911th koipondx86 856 76 7ms 8 Nov 2024 915th eshilo-draper 856 91 365ms 4 Sep 2022 915th ericlangedijk 🇸🇮 856 91 389ms 23 May 2023 915th KatieLG 🇬🇧 856 91 382ms 30 Apr 2024 915th Mikey-Beep 🇬🇧 856 91 341ms 3 Sep 2024 919th DialFrost 🇸🇬 855 61 418ms 21 Jan 2024 920th Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 921st ovs-code 🇩🇪 853 62 131ms 3 Aug 2024 921st MeWhenI 🇻🇦 853 62 134ms 25 Oct 2024 921st Shanethegamer 🇺🇸 853 62 141ms 19 Dec 2024 924th Shanethegamer 🇺🇸 853 85 411ms 18 May 2022 924th GrayJoKing 🇦🇺 853 85 404ms 20 May 2022 926th albanian-laundromat 853 113 254ms 13 days ago 927th JRaspass 🇬🇧 852 46 351ms 4 May 2022 927th Natanaelel 🇸🇪 852 46 542ms 4 May 2022 929th retrohun 852 64 6ms 6 Nov 2022 929th Re-Adventures 🇮🇳 852 64 5ms 7 Nov 2022 929th stellartux 852 64 5ms 26 Dec 2023 929th bac0id 852 64 5ms 29 Jun 2024 929th snoozingnewt 🇨🇦 852 64 5ms 1 Sep 2024 929th albanian-laundromat 852 64 5ms 22 Sep 2025 935th the-zammers 852 68 172ms 2 Oct 2023 936th DialFrost 🇸🇬 852 87 42ms 35 hours ago 937th lynn 851 96 29ms 11 Jul 2023 938th Schmitt-Very-Cool 851 98 435ms 26 Sep 2025 939th inventshah 850 74 2ms 4 May 2022 939th undersquire 850 74 2ms 24 Jun 2023 939th rdmsr 850 74 2ms 24 Jun 2023 939th Bmrl7 850 74 2ms 9 Jul 2023 939th Vinterion 850 74 4ms 6 Nov 2023 939th Herbert00709 🇵🇱 850 74 2ms 22 Dec 2023 945th janAkali 🇷🇺 850 77 123ms 12 Feb 2025 946th krcs 🇵🇱 849 53 282ms 9 May 2022 946th ryanlanegit 849 53 301ms 19 Jun 2022 946th sisyphus-ppcg 🇦🇺 849 53 456ms 15 Aug 2022 949th randolchance 849 63 11ms 8 Jan 2023 949th CatsAreFluffy 849 63 10ms 18 Feb 2023 949th amiralitaheri 849 63 10ms 23 Feb 2023 949th RuyiLi 849 63 9ms 1 Apr 2023 949th TaserTheFox 🇺🇸 849 63 10ms 25 May 2023 949th pfysches-boop 849 63 9ms 6 Aug 2023 949th mhgockel 849 63 10ms 19 Aug 2023 949th NickTheEASDude 🇺🇸 849 63 10ms 18 Jan 2024 949th 823126 849 63 14ms 14 Nov 2024 949th Palladium02 849 63 9ms 12 May 2025 949th 4very 849 63 10ms 10 Jun 2025 949th Ultra814 849 63 9ms 21 Aug 2025 961st DialFrost 🇸🇬 848 66 189ms 7 Apr 2025 962nd SirBogman 🇺🇸 848 89 38ms 4 May 2022 963rd Shanethegamer 🇺🇸 848 98 119ms 26 Oct 2022 963rd emgordon154 848 98 121ms 18 Feb 2025 965th jared-hughes 848 100 56ms 20 Jul 2022 965th ZakkkkAttackkkk 🇵🇭 848 100 52ms 10 Aug 2022 965th Walter225 848 100 54ms 25 Jul 2023 968th AdamHe17 847 73 20ms 31 May 2022 968th AliceFord 847 73 19ms 2 Jun 2022 968th Natanaelel 🇸🇪 847 73 16ms 16 Jun 2022 968th btjones0 847 73 24ms 21 Jun 2022 968th marcin7Cd 847 73 19ms 27 Jun 2022 968th tri1212 🇻🇳 847 73 27ms 18 Jul 2022 968th vhoulbreque 🇫🇷 847 73 19ms 18 Aug 2022 968th KatieLG 🇬🇧 847 73 20ms 29 Aug 2022 First Prev 901–975 of 3,523 Next Last