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 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) Taxicab Numbers 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 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) Taxicab Numbers 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 Turtle Tutorial # Golfer Points Chars Time Submitted 499th bwat2 893 87 464ms 6 Apr 2023 499th bpharaldsson 893 87 397ms 9 Feb 2026 503rd GrayJoKing 🇦🇺 893 91 30ms 19 Jan 2023 504th m-tkach 🇺🇦 893 117 25ms 7 May 2022 504th Lydxn 🇨🇦 893 117 26ms 7 May 2022 506th edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 507th GolfingSuccess 🇬🇷 892 95 61ms 5 May 2022 507th Alex-x90 🇺🇸 892 95 64ms 4 Dec 2022 507th Mandrzejy 🇵🇱 892 95 59ms 22 Mar 2024 507th roupiq 🇵🇱 892 95 61ms 12 days ago 511th p-zubieta 891 48 295ms 6 Mar 2024 512th Ripick 891 73 136ms 8 May 2023 513th edsrzf 🇳🇿 891 78 17ms 16 Aug 2025 514th dokutan 891 88 425ms 15 Feb 2026 515th oeb25 891 93 129ms 16 May 2022 515th snobee 🇨🇦 891 93 130ms 8 Dec 2022 515th logvp 891 93 127ms 2 Jan 2024 515th smartiel 891 93 128ms 12 Aug 2024 515th trist224 🇫🇷 891 93 125ms 12 Aug 2024 515th nullie 891 93 134ms 19 Dec 2024 515th lolgeny 891 93 135ms 22 Feb 2025 522nd JayXon 🇺🇸 890 74 2,567ms 8 days ago 523rd Steffan153 🇫🇮 890 80 28ms 15 Nov 2022 523rd error256 890 80 117ms 8 Apr 2025 525th KatieLG 🇬🇧 889 60 12ms 4 May 2022 525th ScottHamper 889 60 11ms 5 May 2022 525th Re-Adventures 🇮🇳 889 60 11ms 5 May 2022 525th 0x24a537r9 889 60 12ms 29 Jul 2022 525th stefangabos 🇷🇴 889 60 11ms 19 Aug 2022 525th eranws 889 60 10ms 10 Sep 2022 525th GeorgeStechman 🇬🇧 889 60 11ms 26 Sep 2022 525th BloodStormKnight 889 60 15ms 15 Oct 2022 525th dzshn 889 60 16ms 3 Dec 2022 525th biocommando 🇫🇮 889 60 13ms 20 Dec 2022 525th Betuaredead 889 60 12ms 5 Jan 2023 525th piano-miles 889 60 11ms 16 Jan 2023 525th Yewzir 🇧🇪 889 60 11ms 12 Feb 2023 525th shellbertt 🇨🇦 889 60 12ms 26 Feb 2023 525th zakariamouhid 889 60 11ms 20 May 2023 525th raphaelimahorn 889 60 10ms 23 Aug 2023 525th jbt 889 60 12ms 25 Dec 2023 525th olleicua 🇺🇸 889 60 12ms 15 Feb 2024 525th HumanoidCPU 889 60 12ms 3 May 2024 525th dokutan 889 60 10ms 13 Aug 2024 525th LostSyntax21 🇬🇧 889 60 17ms 10 Sep 2024 525th xyangst 889 60 13ms 28 Sep 2024 525th a6166231 🇨🇳 889 60 11ms 15 May 2025 525th SebassNoob 889 60 12ms 5 Aug 2025 525th levinwinter 889 60 11ms 22 Oct 2025 525th Cube14yt 889 60 15ms 16 Nov 2025 525th gigaprofisi 🇺🇸 889 60 12ms 17 Nov 2025 525th amazingalek 🇳🇴 889 60 11ms 20 Dec 2025 525th shandriy 889 60 12ms 23 Jan 2026 525th spidunno 889 60 12ms 17 Feb 2026 555th jared-hughes 889 130 22ms 15 Dec 2024 556th P-Quentin 🇫🇷 888 63 21ms 3 Aug 2022 556th kaptsanovb 888 63 29ms 20 Apr 2023 556th fkantelberg 888 63 20ms 14 Jul 2023 556th VictorStenvers 🇳🇱 888 63 27ms 13 Nov 2023 556th 1231234md5 🇨🇳 888 63 21ms 14 Dec 2023 556th f-tucker 888 63 24ms 6 Feb 2024 556th JunkIce 888 63 25ms 24 Nov 2024 556th Kowalskiexe 🇵🇱 888 63 21ms 19 Apr 2025 556th 123mjb 888 63 24ms 2 Jun 2025 556th DrakeSeteraO 888 63 63ms 24 Oct 2025 556th enigma 888 63 38ms 21 Dec 2025 556th ASampsonMu31 888 63 52ms 13 Mar 2026 556th cuvam 🇺🇸 888 63 52ms 9 days ago 569th Lydxn 🇨🇦 888 107 322ms 6 May 2022 569th CaedenHarper 🇨🇦 888 107 346ms 5 Oct 2025 571st canissimia 🇦🇶 888 110 3,055ms 20 Feb 2023 572nd canissimia 🇦🇶 888 204 16ms 25 Nov 2023 573rd Shanethegamer 🇺🇸 887 61 4ms 31 Oct 2022 573rd MeWhenI 🇻🇦 887 61 4ms 4 Nov 2022 575th Shanethegamer 🇺🇸 887 72 145ms 8 May 2025 575th edsrzf 🇳🇿 887 72 144ms 4 Jul 2025 575th Yewzir 🇧🇪 887 72 134ms 20 Nov 2025 578th lynn 886 65 267ms 5 May 2022 578th GrayJoKing 🇦🇺 886 65 250ms 5 May 2022 578th Sakisan 🇧🇪 886 65 178ms 6 May 2022 578th JayXon 🇺🇸 886 65 271ms 17 Oct 2022 578th Steffan153 🇫🇮 886 65 181ms 12 Nov 2022 578th tobeannouncd 886 65 302ms 25 Apr 2025 578th sean-niemann 🇺🇸 886 65 168ms 9 Jun 2025 585th stefangimmillaro 886 71 95ms 2 Oct 2022 585th Steffan153 🇫🇮 886 71 106ms 23 Feb 2023 585th Shanethegamer 🇺🇸 886 71 101ms 16 May 2023 585th sean-niemann 🇺🇸 886 71 100ms 12 Jul 2024 589th DialFrost 🇸🇬 886 95 30ms 10 Dec 2024 589th snoozingnewt 🇨🇦 886 95 112ms 4 Dec 2025 589th Steffan153 🇫🇮 886 95 111ms 27 Feb 2026 592nd Steffan153 🇫🇮 885 52 7ms 31 Dec 2022 592nd blaztoma 🇱🇹 885 52 8ms 18 Jan 2026 594th GrayJoKing 🇦🇺 885 77 76ms 13 Sep 2024 595th m-tkach 🇺🇦 885 112 116ms 22 Jun 2025 596th frankgraziano 884 75 17ms 23 Feb 2026 597th albanian-laundromat 🇺🇸 884 94 455ms 24 Sep 2025 597th jkelly467 884 94 476ms 23 Oct 2025 597th HumanoidCPU 884 94 454ms 8 Nov 2025 600th GrayJoKing 🇦🇺 883 70 2ms 6 May 2022 First Prev 501–600 of 3,671 Next Last