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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input 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 ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input 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 898th Mezzofloat 843 92 377ms 26 Aug 2023 898th Maximizer02 843 92 360ms 1 Oct 2023 898th madeforlosers 843 92 365ms 21 Nov 2024 898th ChromaChroma 843 92 354ms 7 Oct 2025 898th snoozingnewt 🇨🇦 843 92 379ms 8 Oct 2025 906th dokutan 843 93 428ms 27 Sep 2025 907th krcs 🇵🇱 842 53 282ms 9 May 2022 907th ryanlanegit 842 53 301ms 19 Jun 2022 907th sisyphus-ppcg 🇦🇺 842 53 456ms 15 Aug 2022 910th SirBogman 🇺🇸 842 89 38ms 4 May 2022 911th error256 841 81 71ms 13 Sep 2024 912th CLOStrophobic 🇮🇹 841 89 42ms 14 Feb 2025 913th kmathis22 841 100 31ms 13 Nov 2025 914th raszpi 🇭🇺 840 77 103ms 1 Sep 2023 915th eshilo-draper 839 75 86ms 6 Sep 2022 915th kmathis22 839 75 79ms 5 Sep 2025 917th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 918th beardotpdf 839 99 346ms 4 days ago 919th emplv 🇱🇻 839 124 25ms 31 Oct 2022 920th Codsilla 🇨🇦 838 51 230ms 1 Jul 2022 921st frankgraziano 838 66 4ms 20 Apr 2025 922nd Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 922nd Natanaelel 🇸🇪 838 83 12ms 8 Jul 2023 924th MeWhenI 🇻🇦 838 164 1,639ms 7 Nov 2025 925th ovs-code 🇩🇪 837 85 15ms 11 Dec 2023 926th dokutan 837 88 39ms 9 Jun 2024 927th Steffan153 🇫🇮 837 97 29ms 18 Jan 2023 928th CatsAreFluffy 837 101 54ms 18 Feb 2023 928th annaproxy 837 101 70ms 9 May 2023 928th wojtekmal 837 101 78ms 15 Nov 2023 928th HumanoidCPU 837 101 83ms 6 May 2024 928th eMGeeneer 837 101 449ms 27 Jun 2024 928th bac0id 837 101 77ms 29 Jun 2024 928th michaelmoynihan 837 101 508ms 3 Sep 2025 928th snoozingnewt 🇨🇦 837 101 382ms 6 Oct 2025 936th SirBogman 🇺🇸 835 36 14ms 5 May 2022 936th Natanaelel 🇸🇪 835 36 87ms 15 Jun 2022 936th Steffan153 🇫🇮 835 36 91ms 18 Jan 2023 936th codereport 🇨🇦 835 36 9ms 1 Jun 2024 936th GolfinK 835 36 9ms 21 Nov 2024 936th lifthrasiir 🇰🇷 835 36 10ms 1 Dec 2024 936th GolfingSuccess 🇬🇷 835 36 11ms 20 Mar 2025 943rd scpchicken 🇵🇼 835 55 10ms 4 May 2022 943rd SirBogman 🇺🇸 835 55 6ms 5 May 2022 943rd Shanethegamer 🇺🇸 835 55 6ms 19 May 2023 943rd DialFrost 🇸🇬 835 55 10ms 14 Feb 2025 947th ChiefChippy2 835 56 40ms 4 May 2022 947th aksyristos 835 56 36ms 29 Jan 2023 947th anter69 🇭🇺 835 56 35ms 12 Feb 2024 947th 3dm4n 🇫🇮 835 56 37ms 11 Mar 2024 947th lgrandco 835 56 39ms 9 Oct 2024 947th tatzyr 🇯🇵 835 56 38ms 10 Dec 2024 947th D-MOVE 🇵🇭 835 56 36ms 8 days ago 954th inverseLorentz 🇦🇺 835 69 156ms 3 Jun 2024 954th Yewzir 🇧🇪 835 69 118ms 24 Dec 2024 954th CLOStrophobic 🇮🇹 835 69 170ms 28 May 2025 957th moustave 834 67 23ms 7 Nov 2024 958th Alex-x90 🇺🇸 834 74 2ms 4 Dec 2022 958th undersquire 834 74 2ms 24 Jun 2023 958th rdmsr 834 74 2ms 24 Jun 2023 958th Bmrl7 834 74 2ms 9 Jul 2023 958th Vinterion 834 74 4ms 6 Nov 2023 958th namelessiw 834 74 2ms 28 Dec 2023 958th Jonatan6 🇩🇰 834 74 2ms 15 Mar 2024 958th Mandrzejy 🇵🇱 834 74 2ms 12 Apr 2024 958th kaurakeksi 🇫🇮 834 74 2ms 29 Dec 2024 967th Shanethegamer 🇺🇸 834 82 141ms 15 May 2023 968th p-vf 🇨🇭 834 93 337ms 24 Jun 2022 968th Smetalo 834 93 384ms 25 Aug 2022 968th malworthy 834 93 360ms 19 Aug 2024 971st Grrisly 834 114 287ms 25 Mar 2024 972nd Natanaelel 🇸🇪 833 39 131ms 10 Feb 2025 973rd Steffan153 🇫🇮 833 55 79ms 21 Dec 2022 974th Shanethegamer 🇺🇸 833 57 1,051ms 15 Dec 2022 974th anter69 🇭🇺 833 57 876ms 23 Feb 2023 First Prev 901–975 of 3,500 Next Last