The Calendar hole will go live in approximately 13 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 561st DialFrost 🇸🇬 719 101 11ms 12 Dec 2024 562nd dirckvdende 718 78 11ms 28 Jul 2025 563rd Vinterion 717 90 2ms 19 Jul 2024 564th tomtheisen 🇺🇸 717 102 390ms 10 Apr 2025 565th genmeblog 714 97 11ms 11 Dec 2023 566th cyrilboyer 🇫🇷 713 81 10ms 21 Dec 2023 567th annaproxy 711 91 14ms 4 Dec 2023 568th luuumine 🇫🇷 711 120 50ms 19 Nov 2025 569th Yax42 🇫🇷 710 103 381ms 13 Nov 2025 570th btjones0 709 79 10ms 1 Dec 2023 570th BREMAUCY 🇫🇷 709 79 10ms 1 Dec 2023 570th annaproxy 709 79 10ms 11 Dec 2023 570th OllieBoyne 🇬🇧 709 79 11ms 7 Jan 2024 570th nstearns96 🇬🇧 709 79 10ms 28 Jun 2024 570th bzijlema 🇳🇱 709 79 11ms 27 Nov 2024 570th bricknellj 709 79 11ms 2 Apr 2025 570th guilhem-roy 🇫🇷 709 79 11ms 29 May 2025 570th andrewjc2000 709 79 10ms 27 Jul 2025 570th Lv0Sys 🇵🇱 709 79 11ms 9 days ago 580th drabart 🇵🇱 709 91 2ms 7 Dec 2023 581st adamnielson42 🇺🇸 707 64 7ms 1 Dec 2023 582nd SirBogman 🇺🇸 706 41 2ms 1 Dec 2023 583rd Yewzir 🇧🇪 704 137 265ms 5 Jan 2024 584th DialFrost 🇸🇬 702 60 245ms 16 Jul 2024 585th weliveinhell 🇭🇹 701 92 2ms 2 Dec 2023 586th adamnielson42 🇺🇸 700 80 10ms 1 Dec 2023 587th MeWhenI 🇻🇦 698 101 17ms 1 Dec 2023 588th MeWhenI 🇻🇦 697 69 305ms 1 Dec 2023 589th saito-ta 🇯🇵 697 141 2,676ms 14 Dec 2023 590th albanian-laundromat 696 270 15ms 10 days ago 591st ovs-code 🇩🇪 695 102 5ms 1 Dec 2023 591st edsrzf 🇳🇿 695 102 5ms 19 Nov 2025 593rd dokutan 693 77 352ms 29 Oct 2024 594th Shanethegamer 🇺🇸 693 91 75ms 13 Dec 2024 595th AlephSquirrel 692 81 11ms 6 Dec 2023 595th doktoren 692 81 10ms 10 Dec 2023 595th brimstonetrader 692 81 10ms 23 Feb 2024 595th NickTheEASDude 🇺🇸 692 81 71ms 25 Apr 2024 595th martion2007 692 81 70ms 15 Aug 2024 595th Herbert00709 🇵🇱 692 81 10ms 27 Nov 2024 595th CLOStrophobic 🇮🇹 692 81 11ms 28 Jan 2025 595th Pyroan 692 81 10ms 18 Mar 2025 595th KatieLG 🇬🇧 692 81 21ms 15 Sep 2025 595th vhoulbreque 🇫🇷 692 81 70ms 23 days ago 605th MeWhenI 🇻🇦 692 108 4ms 1 Dec 2023 606th dokutan 690 89 98ms 1 Apr 2025 607th msbranicky 689 140 262ms 1 Jan 2024 608th HumanoidCPU 688 124 63ms 5 Mar 2024 609th Yewzir 🇧🇪 686 79 2ms 26 May 2024 610th Yewzir 🇧🇪 686 83 722ms 5 Feb 2025 611th MateuszPietrzak 🇵🇱 686 94 2ms 7 Dec 2023 612th HumanoidCPU 686 96 2ms 16 Nov 2025 613th dokutan 685 106 11ms 18 days ago 614th cyrilboyer 🇫🇷 684 141 267ms 14 Dec 2023 615th MichalMarsalek 🇨🇿 683 82 10ms 1 Dec 2023 615th Koshu 683 82 11ms 2 Dec 2023 615th uttumuttu 🇫🇮 683 82 10ms 22 Dec 2023 615th fkantelberg 683 82 23ms 12 Jul 2025 619th Shanethegamer 🇺🇸 683 90 93ms 1 Dec 2023 620th JohandeRuiter 🇳🇱 679 95 2ms 22 Jan 2025 621st MeWhenI 🇻🇦 679 102 11ms 9 May 2024 622nd cyrilboyer 🇫🇷 679 118 122ms 19 Dec 2023 623rd albanian-laundromat 678 93 40ms 7 Sep 2025 624th SirBogman 🇺🇸 676 54 36ms 1 Dec 2023 625th namelessiw 675 79 418ms 5 Mar 2024 626th MeWhenI 🇻🇦 675 82 6ms 1 Dec 2023 627th m42km 675 83 10ms 6 Jan 2024 627th Natanaelel 🇸🇪 675 83 10ms 22 Mar 2024 627th davecame 675 83 14ms 25 Apr 2024 630th MeWhenI 🇻🇦 675 105 5ms 1 Dec 2023 631st the-zammers 674 108 129ms 15 Dec 2023 632nd Shanethegamer 🇺🇸 673 106 14ms 31 Jan 2024 632nd AlephSquirrel 673 106 11ms 24 Jun 2024 634th kmathis22 670 113 542ms 12 days ago 635th luuumine 🇫🇷 668 120 113ms 19 Nov 2025 636th janbehrens 🇩🇪 667 83 6ms 1 Dec 2023 637th jared-hughes 667 84 11ms 17 Dec 2023 637th stertooy 🇧🇪 667 84 10ms 14 Jun 2024 637th sacredeux 667 84 11ms 20 Aug 2024 637th hiichbindermax 667 84 11ms 27 May 2025 First Prev 561–640 of 1,473 Next Last