The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Farey Sequence 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 401st rucin93 🇵🇱 831 63 140ms 5 Jan 2025 402nd stefangimmillaro 830 82 106ms 30 Apr 2024 403rd saito-ta 🇯🇵 828 61 405ms 1 Dec 2023 403rd retrohun 828 61 587ms 16 Jun 2024 405th GolfingSuccess 🇬🇷 828 66 9ms 13 Aug 2024 406th Shanethegamer 🇺🇸 828 71 131ms 1 Dec 2023 407th Yewzir 🇧🇪 828 103 58ms 26 May 2024 408th SirBogman 🇺🇸 827 81 40ms 3 Jun 2025 409th MeWhenI 🇻🇦 827 103 3ms 1 Dec 2023 410th MeWhenI 🇻🇦 827 227 15ms 20 Apr 2025 411th stefangimmillaro 826 88 3,864ms 10 Nov 2024 412th snoozingnewt 🇨🇦 826 97 122ms 22 days ago 413th MeWhenI 🇻🇦 826 115 25ms 1 Dec 2023 414th emgordon154 825 70 10ms 9 Mar 2025 415th Shanethegamer 🇺🇸 823 76 126ms 1 Dec 2023 415th MeWhenI 🇻🇦 823 76 118ms 1 Dec 2023 415th edsrzf 🇳🇿 823 76 119ms 10 Jul 2025 418th CaedenHarper 🇨🇦 822 89 368ms 17 Oct 2025 419th sisyphus-ppcg 🇦🇺 821 28 78ms 1 Dec 2023 420th ovs-code 🇩🇪 820 49 155ms 31 Dec 2023 421st DialFrost 🇸🇬 819 79 71ms 24 Mar 2025 422nd DialFrost 🇸🇬 818 64 128ms 3 Aug 2024 423rd stefangimmillaro 817 51 59ms 26 Apr 2024 423rd Natanaelel 🇸🇪 817 51 43ms 24 Jan 2025 425th sisyphus-ppcg 🇦🇺 817 79 2ms 5 Dec 2023 426th alemelis 816 59 881ms 25 Feb 2024 427th ovs-code 🇩🇪 815 77 2ms 15 Dec 2023 428th targrik 814 68 279ms 29 Jan 2025 429th DialFrost 🇸🇬 814 174 1,689ms 15 Sep 2025 430th MeWhenI 🇻🇦 813 70 721ms 15 Sep 2025 431st SirBogman 🇺🇸 812 69 11ms 1 Dec 2023 431st bizy-coder 812 69 11ms 1 Dec 2023 431st inventshah 812 69 11ms 1 Dec 2023 431st Shanethegamer 🇺🇸 812 69 11ms 1 Dec 2023 431st Alex-x90 🇺🇸 812 69 10ms 4 Dec 2023 431st prplz 🇦🇺 812 69 10ms 10 Dec 2023 431st sgiandomenico 812 69 10ms 18 Dec 2023 431st scpchicken 🇵🇼 812 69 10ms 28 Dec 2023 431st StefanHabel 🇨🇦 812 69 10ms 11 Feb 2024 431st IanUtley 812 69 10ms 14 Jun 2024 431st Bulmenisaurus 812 69 10ms 17 Jul 2024 431st edsrzf 🇳🇿 812 69 11ms 20 Dec 2024 431st KasperKivimaeki 🇫🇮 812 69 11ms 5 Jul 2025 431st ryyyn 🇺🇸 812 69 11ms 3 Nov 2025 431st blaztoma 🇱🇹 812 69 12ms 22 Nov 2025 446th DialFrost 🇸🇬 812 92 5ms 14 Feb 2025 447th acotis 810 99 118ms 24 Mar 2025 448th GolfingSuccess 🇬🇷 809 67 2ms 16 Oct 2024 449th ovs-code 🇩🇪 808 66 413ms 15 Jan 2024 449th GrayJoKing 🇦🇺 808 66 405ms 15 Jan 2024 449th sisyphus-ppcg 🇦🇺 808 66 408ms 16 Jan 2024 449th m-tkach 🇺🇦 808 66 424ms 20 Jan 2024 453rd MeWhenI 🇻🇦 808 78 41ms 4 Dec 2023 454th MeWhenI 🇻🇦 808 90 4,188ms 24 Oct 2024 455th stefangimmillaro 807 83 39ms 26 Apr 2025 455th MeWhenI 🇻🇦 807 83 40ms 29 Apr 2025 457th ovs-code 🇩🇪 806 65 140ms 4 Aug 2024 458th GrayJoKing 🇦🇺 804 50 146ms 1 Dec 2023 459th MeWhenI 🇻🇦 804 78 2ms 1 Dec 2023 459th Yewzir 🇧🇪 804 78 2ms 26 May 2024 461st Shanethegamer 🇺🇸 804 89 41ms 12 Sep 2024 462nd SirBogman 🇺🇸 803 234 16ms 4 Dec 2023 463rd emgordon154 802 52 37ms 11 Sep 2024 463rd sean-niemann 🇺🇸 802 52 55ms 13 Oct 2025 465th Steffan153 🇫🇮 802 63 130ms 5 Aug 2024 466th CaedenHarper 🇨🇦 802 72 10ms 23 Aug 2025 467th MeWhenI 🇻🇦 802 99 3ms 1 Dec 2023 467th albanian-laundromat 802 99 3ms 5 Oct 2025 469th 5cw 🇺🇸 800 70 29ms 6 Jun 2024 470th Kacarott 🇦🇺 798 79 72ms 13 Sep 2024 471st CaedenHarper 🇨🇦 798 95 453ms 3 Oct 2025 472nd Yewzir 🇧🇪 797 81 2ms 26 May 2024 473rd pardouin 🇫🇷 797 84 38ms 25 Apr 2025 474th GolfingSuccess 🇬🇷 796 67 401ms 15 Jan 2024 474th MeWhenI 🇻🇦 796 67 429ms 17 Jan 2024 476th AdrienHache 🇫🇷 795 92 386ms 6 Dec 2023 477th stefangimmillaro 794 101 123ms 30 Apr 2024 478th edsrzf 🇳🇿 791 72 810ms 5 Sep 2025 479th tayloia 🇬🇧 791 73 9ms 3 Dec 2023 480th albanian-laundromat 791 86 108ms 11 Nov 2025 First Prev 401–480 of 1,473 Next Last