The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. 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 530th error256 931 32 41ms 12 Apr 2025 530th Lv0Sys 🇵🇱 931 32 34ms 3 Jun 2025 530th ejini6969 931 32 44ms 14 Jun 2025 530th csharpython 931 32 41ms 24 Jul 2025 530th vishal-mohanty 931 32 43ms 24 Aug 2025 530th snoozingnewt 🇨🇦 931 32 42ms 28 Sep 2025 530th blaztoma 🇱🇹 931 32 41ms 12 Oct 2025 530th D-MOVE 🇵🇭 931 32 40ms 3 Feb 2026 530th denkyuu1 931 32 38ms 16 Feb 2026 530th Matter1024 🇮🇳 931 32 43ms 88 mins ago 571st stefangimmillaro 931 63 392ms 12 Jun 2023 571st namelessiw 931 63 377ms 9 Aug 2024 571st fuzzylojik-golf 🇺🇸 931 63 420ms 31 Jul 2025 574th JayXon 🇺🇸 929 92 294ms 29 Jan 2021 574th prplz 🇦🇺 929 92 291ms 11 Feb 2021 574th Lydxn 🇨🇦 929 92 296ms 24 Sep 2021 574th MeWhenI 🇻🇦 929 92 287ms 4 Nov 2021 574th Shanethegamer 🇺🇸 929 92 285ms 28 Dec 2021 574th nwellnhof 🇩🇪 929 92 308ms 28 Dec 2021 574th Steffan153 🇫🇮 929 92 282ms 17 Dec 2022 574th stefangimmillaro 929 92 276ms 12 Jun 2023 574th sean-niemann 🇺🇸 929 92 299ms 30 Aug 2023 574th Yewzir 🇧🇪 929 92 274ms 25 Oct 2023 574th Betuaredead 929 92 287ms 12 Nov 2023 574th edsrzf 🇳🇿 929 92 294ms 1 Nov 2024 574th emgordon154 929 92 294ms 17 Jan 2025 574th fuzzylojik-golf 🇺🇸 929 92 286ms 7 Aug 2025 588th sisyphus-ppcg 🇦🇺 928 44 5ms 18 Dec 2020 589th solmyr2000 928 74 53ms 21 Jun 2022 590th ian-h-chamberlain 🇺🇸 927 62 120ms 27 Jun 2022 590th andersk 🇺🇸 927 62 120ms 25 Oct 2022 590th xnor-gate 927 62 122ms 30 Oct 2022 590th CornerMercury 🇬🇧 927 62 125ms 2 Aug 2023 590th ovs-code 🇩🇪 927 62 112ms 27 Nov 2023 590th DialFrost 🇸🇬 927 62 116ms 31 Dec 2025 590th elgan65536 🇺🇸 927 62 131ms 10 Feb 2026 597th Lydxn 🇨🇦 925 50 103ms 19 Dec 2021 597th JayXon 🇺🇸 925 50 99ms 19 Dec 2021 597th MeWhenI 🇻🇦 925 50 93ms 7 Mar 2023 597th stefangimmillaro 925 50 88ms 8 Mar 2023 597th fuzzylojik-golf 🇺🇸 925 50 111ms 1 Aug 2025 602nd primo-ppcg 🇹🇭 925 54 1ms 10 Oct 2020 602nd nai62 925 54 6ms 29 Aug 2022 602nd sisyphus-ppcg 🇦🇺 925 54 2ms 22 Nov 2022 602nd inventshah 925 54 2ms 22 Dec 2022 602nd ovs-code 🇩🇪 925 54 2ms 22 Aug 2023 602nd ListeriaM 925 54 2ms 23 Aug 2023 602nd m-tkach 🇺🇦 925 54 1ms 12 Oct 2023 602nd JohandeRuiter 🇳🇱 925 54 1,641ms 2 Dec 2023 610th DialFrost 🇸🇬 923 29 268ms 28 Dec 2025 610th GolfingSuccess 🇬🇷 923 29 284ms 7 Feb 2026 612th j55d 921 38 10ms 20 Sep 2018 612th ondras 921 38 10ms 3 May 2020 612th MeWhenI 🇻🇦 921 38 10ms 20 Aug 2021 612th itsh01 921 38 13ms 6 Dec 2021 612th tayloia 🇬🇧 921 38 10ms 16 May 2023 612th Davr1 🇨🇿 921 38 12ms 16 Oct 2023 612th Protothor 921 38 10ms 7 Jun 2025 612th madex 🇩🇪 921 38 10ms 13 days ago 620th primo-ppcg 🇹🇭 921 39 2ms 9 Nov 2022 620th Lydxn 🇨🇦 921 39 2ms 27 Feb 2023 622nd prplz 🇦🇺 921 48 126ms 15 Oct 2020 622nd primo-ppcg 🇹🇭 921 48 126ms 18 Dec 2020 622nd Lydxn 🇨🇦 921 48 126ms 12 Jan 2021 622nd sisyphus-ppcg 🇦🇺 921 48 120ms 29 May 2021 622nd JayXon 🇺🇸 921 48 120ms 12 Jul 2021 622nd MeWhenI 🇻🇦 921 48 125ms 18 Aug 2021 622nd GrayJoKing 🇦🇺 921 48 121ms 5 Dec 2021 622nd MichalMarsalek 🇨🇿 921 48 126ms 12 Sep 2022 622nd Yewzir 🇧🇪 921 48 124ms 17 May 2023 622nd stefangimmillaro 921 48 124ms 4 Aug 2023 622nd sean-niemann 🇺🇸 921 48 130ms 4 Aug 2023 622nd Betuaredead 921 48 124ms 12 Nov 2023 622nd dokutan 921 48 124ms 16 Mar 2024 622nd pardouin 🇫🇷 921 48 122ms 6 Oct 2024 622nd edsrzf 🇳🇿 921 48 125ms 26 Jul 2025 622nd fuzzylojik-golf 🇺🇸 921 48 128ms 31 Aug 2025 622nd janAkali 🇷🇺 921 48 123ms 22 Jan 2026 622nd DialFrost 🇸🇬 921 48 124ms 16 Feb 2026 622nd Steffan153 🇫🇮 921 48 137ms 21 Feb 2026 First Prev 561–640 of 5,537 Next Last