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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator 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 881st DialFrost 🇸🇬 865 84 17ms 1 Jan 2026 882nd typeswitch-dev 🇵🇹 864 75 4ms 22 Jul 2023 883rd dokutan 864 79 10ms 27 Apr 2024 883rd SwordF-Official 🇺🇸 864 79 10ms 1 Feb 2026 885th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 885th Yewzir 🇧🇪 864 161 1,871ms 14 Nov 2025 887th HPWiz 🇳🇿 863 50 233ms 4 May 2022 887th JayXon 🇺🇸 863 50 250ms 5 May 2022 887th Steffan153 🇫🇮 863 50 237ms 10 Dec 2022 887th ovs-code 🇩🇪 863 50 403ms 24 Oct 2023 887th sean-niemann 🇺🇸 863 50 268ms 12 Jul 2024 892nd Setvizan 863 62 11ms 12 Jan 2023 892nd GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 892nd arctouch-cristiannevianna 863 62 11ms 3 Apr 2023 892nd Corxldyphik 863 62 12ms 11 Apr 2023 892nd Blockyheadman 863 62 11ms 1 Nov 2023 892nd ollyspooner 863 62 12ms 22 Nov 2023 892nd itserasmus 863 62 12ms 25 Jan 2024 892nd Jacob385 863 62 11ms 13 Mar 2024 892nd junkondo-jp 863 62 11ms 30 Jun 2024 892nd ShiraJoseph 🇺🇸 863 62 13ms 1 Mar 2025 892nd tomh1012 863 62 11ms 3 Dec 2025 903rd 386asm 🇺🇸 863 86 40ms 9 Apr 2023 903rd DialFrost 🇸🇬 863 86 43ms 30 Dec 2025 905th MeWhenI 🇻🇦 863 145 1,417ms 28 Mar 2025 906th Shanethegamer 🇺🇸 862 70 104ms 12 Dec 2022 906th Alessandro-Balconi 🇮🇹 862 70 103ms 26 Dec 2022 908th NewDefectus 🇮🇱 862 73 3ms 6 May 2022 908th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 908th LorenzoDeGaspari 862 73 2ms 27 May 2024 908th Bpc-CPU 862 73 2ms 12 Jul 2025 908th AZTECCO 862 73 2ms 16 Sep 2025 908th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 908th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 908th albanian-laundromat 🇺🇸 862 73 3ms 20 Jan 2026 916th aditsu 861 77 2,321ms 23 Nov 2025 917th o0lit3 🇺🇸 860 54 7ms 22 Jun 2023 917th Natanaelel 🇸🇪 860 54 7ms 10 Feb 2025 919th Liibe 860 97 471ms 25 Sep 2025 920th stefangimmillaro 860 112 310ms 26 Sep 2023 920th kkoenig 860 112 290ms 4 Jan 2024 922nd frankgraziano 860 198 108ms 14 Oct 2025 923rd Yewzir 🇧🇪 859 65 4ms 9 Oct 2023 923rd MeWhenI 🇻🇦 859 65 4ms 10 Oct 2023 925th scpchicken 🇵🇼 859 72 20ms 4 May 2022 925th sultan 859 72 17ms 6 Jun 2022 925th annaproxy 859 72 22ms 22 Aug 2022 925th BlankSpruce 859 72 24ms 9 Sep 2022 925th ValentinCassayre 859 72 21ms 8 Oct 2022 925th mathb0y512 859 72 22ms 1 Dec 2022 925th NoahBolohan 🇨🇦 859 72 22ms 28 Feb 2023 925th neel11235813 859 72 22ms 8 Mar 2023 925th Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 925th Fracture17 859 72 19ms 8 Apr 2023 925th ayushdewan 859 72 25ms 7 May 2023 925th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 925th Glinte 859 72 24ms 11 Dec 2023 925th nanatsu8 859 72 25ms 11 May 2024 925th thej10n 859 72 20ms 12 Jun 2024 925th tobeannouncd 859 72 18ms 25 Apr 2025 925th YAJUE114514 859 72 17ms 15 Aug 2025 925th madex 🇩🇪 859 72 23ms 23 days ago 943rd Shanethegamer 🇺🇸 858 83 1,252ms 4 May 2022 944th henrydukepickle 858 97 125ms 8 Jul 2025 945th yeminghan2021 858 99 57ms 3 Feb 2025 946th JayXon 🇺🇸 857 56 1,287ms 9 May 2022 947th eshilo-draper 857 91 358ms 4 Sep 2022 947th ericlangedijk 🇸🇮 857 91 369ms 23 May 2023 947th KatieLG 🇬🇧 857 91 377ms 30 Apr 2024 947th Mikey-Beep 🇬🇧 857 91 365ms 3 Sep 2024 951st SirBogman 🇺🇸 856 55 42ms 5 May 2022 951st olivermrose 🇺🇸 856 55 40ms 6 May 2022 951st 4hg 🇺🇸 856 55 40ms 24 Aug 2022 951st DialFrost 🇸🇬 856 55 39ms 1 Jan 2023 951st error256 856 55 42ms 4 May 2024 956th DialFrost 🇸🇬 856 61 439ms 21 Jan 2024 957th mtirado1 856 74 91ms 24 Dec 2022 957th Betuaredead 856 74 95ms 6 Jan 2023 957th KatieLG 🇬🇧 856 74 91ms 15 Jan 2023 957th bwat2 856 74 88ms 31 Mar 2023 First Prev 881–960 of 3,670 Next Last