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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 Gray Code Decoder Gray Code Encoder 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 897th Blockyheadman 863 62 15ms 1 Nov 2023 897th ollyspooner 863 62 11ms 22 Nov 2023 897th itserasmus 863 62 13ms 25 Jan 2024 897th Jacob385 863 62 11ms 13 Mar 2024 897th junkondo-jp 863 62 12ms 30 Jun 2024 897th ShiraJoseph 🇺🇸 863 62 11ms 1 Mar 2025 897th tomh1012 863 62 11ms 3 Dec 2025 897th scpchicken 🇵🇼 863 62 11ms 7 days ago 909th 386asm 🇺🇸 863 86 40ms 9 Apr 2023 909th DialFrost 🇸🇬 863 86 43ms 30 Dec 2025 911th MeWhenI 🇻🇦 863 145 1,208ms 28 Mar 2025 912th Shanethegamer 🇺🇸 862 70 105ms 12 Dec 2022 912th Alessandro-Balconi 🇮🇹 862 70 106ms 26 Dec 2022 914th NewDefectus 🇮🇱 862 73 2ms 6 May 2022 914th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 914th LorenzoDeGaspari 862 73 2ms 27 May 2024 914th Bpc-CPU 862 73 2ms 12 Jul 2025 914th AZTECCO 862 73 2ms 16 Sep 2025 914th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 914th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 914th albanian-laundromat 🇺🇸 862 73 3ms 20 Jan 2026 914th madex 🇩🇪 862 73 2ms 19 days ago 923rd aditsu 861 77 2,433ms 23 Nov 2025 924th o0lit3 🇺🇸 860 54 7ms 22 Jun 2023 924th Natanaelel 🇸🇪 860 54 7ms 10 Feb 2025 926th Liibe 860 97 549ms 25 Sep 2025 927th stefangimmillaro 860 112 341ms 26 Sep 2023 927th kkoenig 860 112 319ms 4 Jan 2024 929th emgordon154 860 160 1,737ms 24 Dec 2025 929th DialFrost 🇸🇬 860 160 1,683ms 17 Jan 2026 931st frankgraziano 860 198 108ms 14 Oct 2025 932nd Yewzir 🇧🇪 859 65 4ms 9 Oct 2023 932nd MeWhenI 🇻🇦 859 65 4ms 10 Oct 2023 934th sultan 859 72 24ms 6 Jun 2022 934th annaproxy 859 72 24ms 22 Aug 2022 934th BlankSpruce 859 72 24ms 9 Sep 2022 934th ValentinCassayre 859 72 21ms 8 Oct 2022 934th mathb0y512 859 72 24ms 1 Dec 2022 934th NoahBolohan 🇨🇦 859 72 24ms 28 Feb 2023 934th neel11235813 859 72 23ms 8 Mar 2023 934th Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 934th Fracture17 859 72 20ms 8 Apr 2023 934th ayushdewan 859 72 24ms 7 May 2023 934th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 934th Glinte 859 72 25ms 11 Dec 2023 934th nanatsu8 859 72 25ms 11 May 2024 934th thej10n 859 72 19ms 12 Jun 2024 934th tobeannouncd 859 72 19ms 25 Apr 2025 934th YAJUE114514 859 72 17ms 15 Aug 2025 934th madex 🇩🇪 859 72 25ms 15 Mar 2026 934th solisolu 859 72 19ms 18 days ago 952nd DialFrost 🇸🇬 859 86 1,476ms 10 Mar 2025 953rd henrydukepickle 858 97 132ms 8 Jul 2025 954th yeminghan2021 858 99 57ms 3 Feb 2025 955th JayXon 🇺🇸 857 56 1,369ms 9 May 2022 956th eshilo-draper 857 91 425ms 4 Sep 2022 956th ericlangedijk 🇸🇮 857 91 437ms 23 May 2023 956th KatieLG 🇬🇧 857 91 413ms 30 Apr 2024 956th Mikey-Beep 🇬🇧 857 91 360ms 3 Sep 2024 960th SirBogman 🇺🇸 856 55 39ms 5 May 2022 960th olivermrose 🇺🇸 856 55 43ms 6 May 2022 960th 4hg 🇺🇸 856 55 45ms 24 Aug 2022 960th DialFrost 🇸🇬 856 55 45ms 1 Jan 2023 960th error256 856 55 43ms 4 May 2024 965th DialFrost 🇸🇬 856 61 543ms 21 Jan 2024 966th mtirado1 856 74 94ms 24 Dec 2022 966th Betuaredead 856 74 88ms 6 Jan 2023 966th KatieLG 🇬🇧 856 74 94ms 15 Jan 2023 966th bwat2 856 74 87ms 31 Mar 2023 966th stackotter 856 74 91ms 29 May 2023 966th ovs-code 🇩🇪 856 74 93ms 17 Apr 2024 972nd Shanethegamer 🇺🇸 855 99 25ms 27 Apr 2023 973rd ovs-code 🇩🇪 854 85 14ms 11 Dec 2023 974th ovs-code 🇩🇪 853 62 138ms 3 Aug 2024 974th MeWhenI 🇻🇦 853 62 144ms 25 Oct 2024 974th Shanethegamer 🇺🇸 853 62 142ms 19 Dec 2024 977th Shanethegamer 🇺🇸 853 85 429ms 18 May 2022 977th GrayJoKing 🇦🇺 853 85 407ms 20 May 2022 979th JRaspass 🇬🇧 852 46 409ms 4 May 2022 979th Natanaelel 🇸🇪 852 46 357ms 4 May 2022 981st retrohun 852 64 4ms 6 Nov 2022 981st Re-Adventures 🇮🇳 852 64 4ms 7 Nov 2022 981st stellartux 852 64 4ms 26 Dec 2023 981st bac0id 852 64 4ms 29 Jun 2024 981st snoozingnewt 🇨🇦 852 64 4ms 1 Sep 2024 981st albanian-laundromat 🇺🇸 852 64 4ms 22 Sep 2025 987th the-zammers 852 68 165ms 2 Oct 2023 988th lynn 852 96 29ms 11 Jul 2023 989th inventshah 851 74 2ms 4 May 2022 989th undersquire 851 74 2ms 24 Jun 2023 989th rdmsr 851 74 2ms 24 Jun 2023 989th Bmrl7 851 74 2ms 9 Jul 2023 989th Vinterion 851 74 2ms 6 Nov 2023 994th janAkali 🇷🇺 851 77 137ms 12 Feb 2025 995th Schmitt-Very-Cool 851 98 456ms 26 Sep 2025 996th randolchance 850 63 12ms 8 Jan 2023 996th CatsAreFluffy 850 63 14ms 18 Feb 2023 996th amiralitaheri 850 63 13ms 23 Feb 2023 996th RuyiLi 850 63 13ms 1 Apr 2023 996th TaserTheFox 🇺🇸 850 63 15ms 25 May 2023 First Prev 901–1,000 of 3,693 Next Last