The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 hours. Why not try and solve them ahead of time?
Prime Numbers in all languages 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 532nd TFeld00 🇩🇰 931 32 41ms 3 Sep 2024 532nd tatzyr 🇯🇵 931 32 41ms 17 Nov 2024 532nd error256 931 32 41ms 12 Apr 2025 532nd Lv0Sys 🇵🇱 931 32 34ms 3 Jun 2025 532nd ejini6969 931 32 44ms 14 Jun 2025 532nd csharpython 931 32 41ms 24 Jul 2025 532nd vishal-mohanty 931 32 43ms 24 Aug 2025 532nd snoozingnewt 🇨🇦 931 32 42ms 28 Sep 2025 532nd blaztoma 🇱🇹 931 32 41ms 12 Oct 2025 532nd D-MOVE 🇵🇭 931 32 40ms 3 Feb 2026 532nd denkyuu1 931 32 38ms 16 Feb 2026 532nd Matter1024 🇮🇳 931 32 43ms 2 days ago 573rd stefangimmillaro 931 63 392ms 12 Jun 2023 573rd namelessiw 931 63 377ms 9 Aug 2024 573rd fuzzylojik-golf 🇺🇸 931 63 420ms 31 Jul 2025 576th JayXon 🇺🇸 929 92 294ms 29 Jan 2021 576th prplz 🇦🇺 929 92 291ms 11 Feb 2021 576th Lydxn 🇨🇦 929 92 296ms 24 Sep 2021 576th MeWhenI 🇻🇦 929 92 287ms 4 Nov 2021 576th Shanethegamer 🇺🇸 929 92 285ms 28 Dec 2021 576th nwellnhof 🇩🇪 929 92 308ms 28 Dec 2021 576th Steffan153 🇫🇮 929 92 282ms 17 Dec 2022 576th stefangimmillaro 929 92 276ms 12 Jun 2023 576th sean-niemann 🇺🇸 929 92 299ms 30 Aug 2023 576th Yewzir 🇧🇪 929 92 274ms 25 Oct 2023 576th Betuaredead 929 92 287ms 12 Nov 2023 576th edsrzf 🇳🇿 929 92 294ms 1 Nov 2024 576th emgordon154 929 92 294ms 17 Jan 2025 576th fuzzylojik-golf 🇺🇸 929 92 286ms 7 Aug 2025 590th sisyphus-ppcg 🇦🇺 928 44 5ms 18 Dec 2020 591st solmyr2000 928 74 53ms 21 Jun 2022 592nd ian-h-chamberlain 🇺🇸 927 62 120ms 27 Jun 2022 592nd andersk 🇺🇸 927 62 119ms 25 Oct 2022 592nd xnor-gate 927 62 122ms 30 Oct 2022 592nd CornerMercury 🇬🇧 927 62 123ms 2 Aug 2023 592nd ovs-code 🇩🇪 927 62 112ms 27 Nov 2023 592nd DialFrost 🇸🇬 927 62 116ms 31 Dec 2025 592nd elgan65536 🇺🇸 927 62 126ms 10 Feb 2026 599th Lydxn 🇨🇦 925 50 88ms 19 Dec 2021 599th JayXon 🇺🇸 925 50 93ms 19 Dec 2021 599th MeWhenI 🇻🇦 925 50 86ms 7 Mar 2023 599th stefangimmillaro 925 50 88ms 8 Mar 2023 599th fuzzylojik-golf 🇺🇸 925 50 111ms 1 Aug 2025 604th primo-ppcg 🇹🇭 925 54 1ms 10 Oct 2020 604th nai62 925 54 6ms 29 Aug 2022 604th sisyphus-ppcg 🇦🇺 925 54 2ms 22 Nov 2022 604th inventshah 925 54 2ms 22 Dec 2022 604th ovs-code 🇩🇪 925 54 2ms 22 Aug 2023 604th ListeriaM 925 54 2ms 23 Aug 2023 604th m-tkach 🇺🇦 925 54 1ms 12 Oct 2023 604th JohandeRuiter 🇳🇱 925 54 1,641ms 2 Dec 2023 612th DialFrost 🇸🇬 923 29 268ms 28 Dec 2025 612th GolfingSuccess 🇬🇷 923 29 284ms 7 Feb 2026 614th j55d 921 38 10ms 20 Sep 2018 614th ondras 921 38 10ms 3 May 2020 614th MeWhenI 🇻🇦 921 38 10ms 20 Aug 2021 614th itsh01 921 38 9ms 6 Dec 2021 614th tayloia 🇬🇧 921 38 9ms 16 May 2023 614th Davr1 🇨🇿 921 38 10ms 16 Oct 2023 614th Protothor 921 38 9ms 7 Jun 2025 614th madex 🇩🇪 921 38 9ms 15 days ago 622nd primo-ppcg 🇹🇭 921 39 2ms 9 Nov 2022 622nd Lydxn 🇨🇦 921 39 2ms 27 Feb 2023 624th prplz 🇦🇺 921 48 126ms 15 Oct 2020 624th primo-ppcg 🇹🇭 921 48 126ms 18 Dec 2020 624th Lydxn 🇨🇦 921 48 126ms 12 Jan 2021 624th sisyphus-ppcg 🇦🇺 921 48 120ms 29 May 2021 624th JayXon 🇺🇸 921 48 120ms 12 Jul 2021 624th MeWhenI 🇻🇦 921 48 125ms 18 Aug 2021 624th GrayJoKing 🇦🇺 921 48 121ms 5 Dec 2021 624th MichalMarsalek 🇨🇿 921 48 126ms 12 Sep 2022 624th Yewzir 🇧🇪 921 48 124ms 17 May 2023 624th stefangimmillaro 921 48 124ms 4 Aug 2023 624th sean-niemann 🇺🇸 921 48 130ms 4 Aug 2023 624th Betuaredead 921 48 124ms 12 Nov 2023 624th dokutan 921 48 124ms 16 Mar 2024 624th pardouin 🇫🇷 921 48 122ms 6 Oct 2024 624th edsrzf 🇳🇿 921 48 125ms 26 Jul 2025 624th fuzzylojik-golf 🇺🇸 921 48 128ms 31 Aug 2025 624th janAkali 🇷🇺 921 48 123ms 22 Jan 2026 First Prev 561–640 of 5,538 Next Last