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 872nd ShiraJoseph 🇺🇸 863 62 13ms 1 Mar 2025 872nd tomh1012 863 62 12ms 3 Dec 2025 883rd MeWhenI 🇻🇦 863 145 1,547ms 28 Mar 2025 884th DialFrost 🇸🇬 862 56 1,180ms 1 Sep 2025 884th GolfingSuccess 🇬🇷 862 56 905ms 21 days ago 886th NewDefectus 🇮🇱 862 73 3ms 6 May 2022 886th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 886th LorenzoDeGaspari 862 73 2ms 27 May 2024 886th Bpc-CPU 862 73 2ms 12 Jul 2025 886th AZTECCO 862 73 2ms 16 Sep 2025 886th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 886th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 886th albanian-laundromat 862 73 3ms 20 Jan 2026 894th 386asm 🇺🇸 862 86 40ms 9 Apr 2023 894th DialFrost 🇸🇬 862 86 43ms 30 Dec 2025 896th Shanethegamer 🇺🇸 861 70 99ms 12 Dec 2022 896th Alessandro-Balconi 🇮🇹 861 70 95ms 26 Dec 2022 898th o0lit3 🇺🇸 860 54 8ms 22 Jun 2023 898th Natanaelel 🇸🇪 860 54 7ms 10 Feb 2025 900th Liibe 860 97 477ms 25 Sep 2025 901st stefangimmillaro 860 112 313ms 26 Sep 2023 901st kkoenig 860 112 290ms 4 Jan 2024 903rd frankgraziano 860 198 108ms 14 Oct 2025 904th Yewzir 🇧🇪 859 65 4ms 9 Oct 2023 904th MeWhenI 🇻🇦 859 65 4ms 10 Oct 2023 906th scpchicken 🇵🇼 859 72 20ms 4 May 2022 906th sultan 859 72 17ms 6 Jun 2022 906th annaproxy 859 72 22ms 22 Aug 2022 906th BlankSpruce 859 72 24ms 9 Sep 2022 906th ValentinCassayre 859 72 21ms 8 Oct 2022 906th mathb0y512 859 72 22ms 1 Dec 2022 906th NoahBolohan 🇨🇦 859 72 23ms 28 Feb 2023 906th neel11235813 859 72 22ms 8 Mar 2023 906th Kacarott 🇦🇺 859 72 17ms 24 Mar 2023 906th Fracture17 859 72 19ms 8 Apr 2023 906th ayushdewan 859 72 25ms 7 May 2023 906th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 906th Glinte 859 72 24ms 11 Dec 2023 906th nanatsu8 859 72 26ms 11 May 2024 906th thej10n 859 72 20ms 12 Jun 2024 906th tobeannouncd 859 72 18ms 25 Apr 2025 906th YAJUE114514 859 72 17ms 15 Aug 2025 923rd aditsu 859 77 2,303ms 23 Nov 2025 924th Shanethegamer 🇺🇸 858 83 1,374ms 4 May 2022 925th yeminghan2021 858 99 54ms 3 Feb 2025 926th henrydukepickle 857 97 132ms 8 Jul 2025 927th SirBogman 🇺🇸 856 55 38ms 5 May 2022 927th olivermrose 🇺🇸 856 55 42ms 6 May 2022 927th 4hg 🇺🇸 856 55 50ms 24 Aug 2022 927th DialFrost 🇸🇬 856 55 43ms 1 Jan 2023 927th error256 856 55 40ms 4 May 2024 932nd JayXon 🇺🇸 856 56 1,287ms 9 May 2022 933rd mtirado1 856 74 80ms 24 Dec 2022 933rd Betuaredead 856 74 78ms 6 Jan 2023 933rd KatieLG 🇬🇧 856 74 92ms 15 Jan 2023 933rd bwat2 856 74 80ms 31 Mar 2023 933rd stackotter 856 74 84ms 29 May 2023 933rd ovs-code 🇩🇪 856 74 84ms 17 Apr 2024 933rd madeforlosers 856 74 82ms 21 Nov 2024 940th eshilo-draper 856 91 392ms 4 Sep 2022 940th ericlangedijk 🇸🇮 856 91 398ms 23 May 2023 940th KatieLG 🇬🇧 856 91 411ms 30 Apr 2024 940th Mikey-Beep 🇬🇧 856 91 388ms 3 Sep 2024 944th DialFrost 🇸🇬 855 61 439ms 21 Jan 2024 945th Shanethegamer 🇺🇸 855 99 24ms 27 Apr 2023 946th ovs-code 🇩🇪 853 62 147ms 3 Aug 2024 946th MeWhenI 🇻🇦 853 62 144ms 25 Oct 2024 946th Shanethegamer 🇺🇸 853 62 152ms 19 Dec 2024 949th Shanethegamer 🇺🇸 853 85 479ms 18 May 2022 949th GrayJoKing 🇦🇺 853 85 407ms 20 May 2022 951st JRaspass 🇬🇧 852 46 379ms 4 May 2022 951st Natanaelel 🇸🇪 852 46 378ms 4 May 2022 953rd retrohun 852 64 4ms 6 Nov 2022 953rd Re-Adventures 🇮🇳 852 64 4ms 7 Nov 2022 953rd stellartux 852 64 4ms 26 Dec 2023 953rd bac0id 852 64 4ms 29 Jun 2024 953rd snoozingnewt 🇨🇦 852 64 4ms 1 Sep 2024 953rd albanian-laundromat 852 64 4ms 22 Sep 2025 959th the-zammers 852 68 165ms 2 Oct 2023 960th lynn 852 96 29ms 11 Jul 2023 First Prev 881–960 of 3,618 Next Last