Collatz in all languages in chars. 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 Chars Time Submitted 878th saito-ta 🇯🇵 846 26 150ms 12 Dec 2024 882nd randolchance 846 63 11ms 8 Jan 2023 882nd CatsAreFluffy 846 63 10ms 18 Feb 2023 882nd amiralitaheri 846 63 11ms 23 Feb 2023 882nd RuyiLi 846 63 11ms 1 Apr 2023 882nd TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 882nd pfysches-boop 846 63 10ms 6 Aug 2023 882nd mhgockel 846 63 11ms 19 Aug 2023 882nd NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 882nd 823126 846 63 12ms 14 Nov 2024 882nd Palladium02 846 63 10ms 12 May 2025 882nd 4very 846 63 13ms 10 Jun 2025 882nd Ultra814 846 63 11ms 21 Aug 2025 894th NewDefectus 🇮🇱 846 73 3ms 6 May 2022 894th inventshah 846 73 2ms 12 Jun 2022 894th Natanaelel 🇸🇪 846 73 2ms 15 Jun 2022 894th Herbert00709 🇵🇱 846 73 2ms 22 Dec 2023 894th LorenzoDeGaspari 846 73 2ms 27 May 2024 894th Bpc-CPU 846 73 2ms 12 Jul 2025 894th AZTECCO 846 73 2ms 16 Sep 2025 894th CaedenHarper 🇨🇦 846 73 2ms 28 Sep 2025 894th prestosilver 🇺🇸 846 73 2ms 3 Dec 2025 894th albanian-laundromat 846 73 3ms 20 Jan 2026 904th Natanaelel 🇸🇪 845 57 459ms 17 Jan 2024 904th Kacarott 🇦🇺 845 57 402ms 10 Sep 2024 904th albanian-laundromat 845 57 526ms 7 Oct 2025 907th retrohun 845 64 4ms 6 Nov 2022 907th Re-Adventures 🇮🇳 845 64 4ms 7 Nov 2022 907th stellartux 845 64 4ms 26 Dec 2023 907th bac0id 845 64 4ms 29 Jun 2024 907th snoozingnewt 🇨🇦 845 64 4ms 1 Sep 2024 907th albanian-laundromat 845 64 4ms 22 Sep 2025 913th Shanethegamer 🇺🇸 845 98 133ms 26 Oct 2022 913th emgordon154 845 98 122ms 18 Feb 2025 915th janAkali 🇷🇺 844 77 132ms 12 Feb 2025 916th bschorno 844 92 375ms 12 Oct 2022 916th ChrisTheisen 844 92 371ms 14 Dec 2022 916th kellantech 844 92 408ms 4 Jul 2023 916th Mezzofloat 844 92 402ms 26 Aug 2023 916th Maximizer02 844 92 408ms 1 Oct 2023 916th madeforlosers 844 92 407ms 21 Nov 2024 916th ChromaChroma 844 92 407ms 7 Oct 2025 916th snoozingnewt 🇨🇦 844 92 422ms 8 Oct 2025 924th DialFrost 🇸🇬 843 66 93ms 7 Apr 2025 924th KasperKivimaeki 🇫🇮 843 66 6ms 22 Dec 2025 926th krcs 🇵🇱 842 53 280ms 9 May 2022 926th ryanlanegit 842 53 312ms 19 Jun 2022 926th sisyphus-ppcg 🇦🇺 842 53 453ms 15 Aug 2022 929th MeWhenI 🇻🇦 842 71 106ms 13 Dec 2022 930th SirBogman 🇺🇸 842 89 38ms 4 May 2022 931st error256 841 81 68ms 13 Sep 2024 932nd CLOStrophobic 🇮🇹 841 89 42ms 14 Feb 2025 933rd kmathis22 841 100 31ms 13 Nov 2025 934th emplv 🇱🇻 841 124 25ms 31 Oct 2022 935th raszpi 🇭🇺 840 77 111ms 1 Sep 2023 936th MeWhenI 🇻🇦 840 164 1,639ms 7 Nov 2025 937th frankgraziano 839 66 4ms 20 Apr 2025 938th eshilo-draper 839 75 90ms 6 Sep 2022 938th kmathis22 839 75 85ms 5 Sep 2025 940th sean-niemann 🇺🇸 839 76 141ms 8 Oct 2024 941st beardotpdf 839 99 422ms 12 Dec 2025 942nd Codsilla 🇨🇦 838 51 263ms 1 Jul 2022 943rd steffan-polygolf 838 81 10ms 23 Feb 2023 943rd FranklinJiaChen 838 81 9ms 15 days ago 945th Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 945th Natanaelel 🇸🇪 838 83 12ms 8 Jul 2023 947th Steffan153 🇫🇮 838 97 31ms 18 Jan 2023 948th CatsAreFluffy 838 101 58ms 18 Feb 2023 948th annaproxy 838 101 58ms 9 May 2023 948th wojtekmal 838 101 56ms 15 Nov 2023 948th HumanoidCPU 838 101 57ms 6 May 2024 948th eMGeeneer 838 101 425ms 27 Jun 2024 948th bac0id 838 101 56ms 29 Jun 2024 948th michaelmoynihan 838 101 422ms 3 Sep 2025 948th snoozingnewt 🇨🇦 838 101 418ms 6 Oct 2025 956th dokutan 837 88 39ms 9 Jun 2024 957th scpchicken 🇵🇼 836 55 11ms 4 May 2022 957th SirBogman 🇺🇸 836 55 8ms 5 May 2022 957th Shanethegamer 🇺🇸 836 55 6ms 19 May 2023 957th DialFrost 🇸🇬 836 55 11ms 14 Feb 2025 First Prev 881–960 of 3,592 Next Last