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 557th 1231234md5 🇨🇳 887 63 20ms 14 Dec 2023 557th f-tucker 887 63 23ms 6 Feb 2024 557th JunkIce 887 63 24ms 24 Nov 2024 557th Kowalskiexe 🇵🇱 887 63 19ms 19 Apr 2025 557th 123mjb 887 63 24ms 2 Jun 2025 557th DrakeSeteraO 887 63 52ms 24 Oct 2025 557th enigma 887 63 33ms 21 Dec 2025 557th ASampsonMu31 887 63 50ms 5 hours ago 569th JayXon 🇺🇸 887 74 2,178ms 14 Nov 2024 570th jared-hughes 887 130 22ms 15 Dec 2024 571st lynn 886 65 283ms 5 May 2022 571st GrayJoKing 🇦🇺 886 65 250ms 5 May 2022 571st Sakisan 🇧🇪 886 65 178ms 6 May 2022 571st JayXon 🇺🇸 886 65 301ms 17 Oct 2022 571st Steffan153 🇫🇮 886 65 181ms 12 Nov 2022 571st tobeannouncd 886 65 302ms 25 Apr 2025 571st sean-niemann 🇺🇸 886 65 168ms 9 Jun 2025 578th stefangimmillaro 886 71 89ms 2 Oct 2022 578th Steffan153 🇫🇮 886 71 97ms 23 Feb 2023 578th Shanethegamer 🇺🇸 886 71 93ms 16 May 2023 578th sean-niemann 🇺🇸 886 71 92ms 12 Jul 2024 582nd Shanethegamer 🇺🇸 886 72 145ms 8 May 2025 582nd edsrzf 🇳🇿 886 72 144ms 4 Jul 2025 582nd Yewzir 🇧🇪 886 72 148ms 20 Nov 2025 585th DialFrost 🇸🇬 886 95 29ms 10 Dec 2024 586th canissimia 🇦🇶 886 110 2,640ms 20 Feb 2023 587th GrayJoKing 🇦🇺 885 77 76ms 13 Sep 2024 588th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 588th blaztoma 🇱🇹 884 52 8ms 18 Jan 2026 590th CaedenHarper 🇨🇦 884 54 1,451ms 27 Sep 2025 590th sean-niemann 🇺🇸 884 54 1,442ms 27 Sep 2025 590th albanian-laundromat 884 54 959ms 14 Nov 2025 590th xsot 🇸🇬 884 54 1,025ms 15 Nov 2025 594th albanian-laundromat 884 94 486ms 24 Sep 2025 594th jkelly467 884 94 401ms 23 Oct 2025 594th HumanoidCPU 884 94 479ms 8 Nov 2025 597th snoozingnewt 🇨🇦 884 95 118ms 4 Dec 2025 597th Steffan153 🇫🇮 884 95 120ms 14 days ago 599th m-tkach 🇺🇦 883 112 119ms 22 Jun 2025 600th stefangimmillaro 882 53 37ms 2 Oct 2022 600th Haksell 🇦🇶 882 53 42ms 22 Feb 2023 602nd GrayJoKing 🇦🇺 882 70 2ms 6 May 2022 602nd ovs-code 🇩🇪 882 70 2ms 8 Oct 2023 602nd 09cf 882 70 2ms 8 Oct 2023 602nd saito-ta 🇯🇵 882 70 2ms 21 Dec 2023 602nd sean-niemann 🇺🇸 882 70 2ms 10 Jul 2024 602nd KasperKivimaeki 🇫🇮 882 70 6ms 8 Aug 2025 608th frankgraziano 882 75 16ms 17 days ago 609th primo-ppcg 🇹🇭 882 85 39ms 14 Jan 2025 609th MeWhenI 🇻🇦 882 85 41ms 21 Apr 2025 611th SiestaGuru 882 88 411ms 9 Jan 2023 611th rifatx 882 88 390ms 5 Jul 2024 611th kmathis22 882 88 398ms 25 Sep 2025 614th nipzu 882 94 128ms 17 May 2022 614th Natanaelel 🇸🇪 882 94 128ms 17 Jun 2022 614th nkoppel 882 94 130ms 19 Oct 2022 614th ovs-code 🇩🇪 882 94 122ms 21 Jun 2023 614th mousetail 🇳🇱 882 94 126ms 12 Jan 2024 619th Irratix 🇳🇱 882 96 80ms 4 May 2022 619th MeWhenI 🇻🇦 882 96 60ms 1 Jun 2022 619th janbehrens 🇩🇪 882 96 64ms 21 Apr 2023 619th Shanethegamer 🇺🇸 882 96 64ms 15 May 2023 619th Yewzir 🇧🇪 882 96 60ms 11 Nov 2023 619th MateuszPietrzak 🇵🇱 882 96 63ms 18 Nov 2023 619th kkoenig 882 96 57ms 21 Dec 2023 619th BlankSpruce 882 96 62ms 20 Aug 2024 619th fuzzylojik-golf 🇺🇸 882 96 61ms 14 Jun 2025 619th dokutan 882 96 64ms 8 Feb 2026 629th primo-ppcg 🇹🇭 881 52 219ms 5 May 2022 629th dvargas46 🇺🇸 881 52 87ms 22 Dec 2022 631st frosster 🇨🇦 881 77 5ms 8 Feb 2026 632nd ovs-code 🇩🇪 881 89 458ms 24 Jul 2024 632nd jipsong 🇩🇪 881 89 450ms 7 Apr 2025 632nd DialFrost 🇸🇬 881 89 485ms 24 Dec 2025 635th sisyphus-ppcg 🇦🇺 880 40 347ms 31 Jan 2023 635th sean-niemann 🇺🇸 880 40 358ms 8 Mar 2025 637th ovs-code 🇩🇪 880 73 340ms 22 Jul 2023 638th sean-niemann 🇺🇸 880 108 278ms 25 May 2024 638th GolfingSuccess 🇬🇷 880 108 289ms 6 Sep 2025 640th primo-ppcg 🇹🇭 880 193 107ms 14 Aug 2025 First Prev 561–640 of 3,598 Next Last