The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Abundant Numbers (Long) in Java 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 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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st Lydxn 🇨🇦 1,000 85 475ms 12 Dec 2025 2nd JayXon 🇺🇸 988 86 392ms 26 Sep 2025 3rd DialFrost 🇸🇬 966 88 366ms 17 Nov 2025 4th KasperKivimaeki 🇫🇮 955 89 378ms 30 Nov 2025 5th fuzzylojik-golf 🇺🇸 934 91 371ms 24 Sep 2025 5th dokutan 934 91 382ms 24 Sep 2025 5th sean-niemann 🇺🇸 934 91 380ms 24 Sep 2025 5th Shanethegamer 🇺🇸 934 91 469ms 25 Sep 2025 5th nwellnhof 🇩🇪 934 91 495ms 25 Sep 2025 5th Yewzir 🇧🇪 934 91 373ms 2 Oct 2025 5th namelessiw 934 91 410ms 4 Oct 2025 5th Yax42 🇫🇷 934 91 512ms 4 Oct 2025 5th stefangimmillaro 934 91 437ms 6 Oct 2025 5th snoozingnewt 🇨🇦 934 91 380ms 9 Oct 2025 5th CaedenHarper 🇨🇦 934 91 397ms 19 Oct 2025 5th MeWhenI 🇻🇦 934 91 382ms 7 Nov 2025 5th emgordon154 934 91 377ms 9 Feb 2026 5th Steffan153 🇫🇮 934 91 389ms 11 Feb 2026 5th raphaelimahorn 934 91 463ms 11 days ago 5th edsrzf 🇳🇿 934 91 392ms 28 hours ago 21st roelderickx 924 92 388ms 8 hours ago 21st bitsandbeyond 🇳🇱 924 92 385ms 7 hours ago 23rd kmathis22 914 93 364ms 23 Oct 2025 23rd ethanlally 914 93 477ms 12 Nov 2025 23rd prestosilver 🇺🇸 914 93 428ms 13 hours ago 23rd error256 914 93 355ms 13 hours ago 23rd tomh1012 914 93 383ms 13 hours ago 23rd jkelly467 914 93 375ms 10 hours ago 29th h3ra993huskp 🇯🇵 904 94 472ms 30 Nov 2025 30th Liibe 895 95 427ms 25 Sep 2025 30th piano-miles 895 95 405ms 27 days ago 32nd Schmitt-Very-Cool 859 99 486ms 26 Sep 2025 32nd tigerdan2 🇩🇪 859 99 479ms 30 Nov 2025 32nd elgan65536 🇺🇸 859 99 409ms 19 Feb 2026 32nd albanian-laundromat 859 99 386ms 28 hours ago 36th Matter1024 🇮🇳 850 100 402ms 26 hours ago 37th Florian-Mt 817 104 456ms 8 Jan 2026 37th blaztoma 🇱🇹 817 104 413ms 20 hours ago 39th jared-hughes 810 105 461ms 24 Sep 2025 39th ravnskjaer 🇩🇰 810 105 442ms 15 Dec 2025 41st kasarino 802 106 368ms 22 hours ago 42nd Protothor 766 111 383ms 23 hours ago 43rd rucin93 🇵🇱 733 116 392ms 20 hours ago 44th janAkali 🇷🇺 697 122 389ms 27 hours ago 45th mrondon8 669 127 403ms 2 Dec 2024 46th janbehrens 🇩🇪 664 128 412ms 19 Nov 2022 46th Betuaredead 664 128 434ms 7 Jan 2023 46th eMGeeneer 664 128 408ms 15 Jun 2024 46th Jacob385 664 128 347ms 1 Apr 2025 46th plastic-bottle 664 128 401ms 28 Aug 2025 51st annaproxy 659 129 409ms 2 Jan 2023 51st LordSir101 659 129 382ms 17 Sep 2025 51st madex 🇩🇪 659 129 345ms 4 hours ago 54th KrausRaus 🇺🇸 654 130 384ms 28 Nov 2022 55th bwat2 649 131 392ms 3 Mar 2023 55th yoshykai 649 131 403ms 26 Mar 2025 57th cbrt-x 644 132 416ms 14 Sep 2023 57th eiburns 644 132 413ms 3 Oct 2023 59th bac0id 639 133 405ms 26 Sep 2023 59th rifatx 639 133 384ms 22 Jul 2024 61st Omega65536 🇩🇪 630 135 404ms 23 Nov 2022 61st Leftykap 630 135 413ms 27 Nov 2022 61st jhpaques 🇫🇷 630 135 416ms 25 Feb 2023 61st Apataras 630 135 410ms 10 Jul 2025 61st Emutis 🇱🇹 630 135 327ms 9 hours ago 66th astdefu 625 136 396ms 13 Dec 2022 67th OriEy 620 137 414ms 27 Apr 2023 68th Pyro569 612 139 410ms 20 Jul 2023 68th riviere-lucas 612 139 400ms 12 Jan 2024 68th msbranicky 612 139 343ms 16 hours ago 71st bidger 607 140 398ms 13 Dec 2022 71st althryenix 607 140 413ms 18 Jan 2023 71st crizin 🇰🇷 607 140 398ms 9 Sep 2023 74th AstroOrbis 603 141 381ms 12 hours ago 75th MrGagnonHPS 590 144 407ms 15 Oct 2023 76th Techdude01 582 146 397ms 26 Nov 2022 77th aDwarfNamedUrist 574 148 385ms 30 Aug 2023 78th luca1339 567 150 410ms 7 Jun 2024 79th null-tangent 563 151 405ms 14 May 2023 79th VladislavGitter 🇪🇸 563 151 394ms 13 Nov 2023 1–80 of 97 Next Last
